Plant guides · Plant lists

Plants toxic to cats and dogs.

Cats chew, dogs dig, and a surprising share of the plants sold as houseplants are on the wrong side of the line. This list collects the plants in our guides whose care profile flags them as harmful to cats or dogs, with the line that says how. Lilies, sago palm and oleander are the ones vets see most; the rest cause anything from drooling to a bad night.

538 plants

Not an exhaustive list, and a plant that is missing is not therefore safe. If your pet has eaten something, call your vet; the ASPCA plant database is the reference to check.

A

Ackee Blighia sapida
The unripe fruit and seeds contain hypoglycin A, which is toxic to both cats and dogs if ingested.
African Fig Ficus cyathistipula
This plant is toxic to cats and dogs if ingested.
African lily Agapanthus africanus
This plant is considered toxic to cats and dogs if ingested.
African Mask Plant Alocasia × amazonica
This plant is toxic to cats and dogs if ingested.
African milk tree Euphorbia trigona
This plant is toxic to cats and dogs because its milky sap causes severe irritation.
Agave
Agave plants contain calcium oxalate crystals that can cause irritation and swelling if ingested by cats or dogs.
Ail Allium sativum
Garlic is toxic to cats and dogs as it can cause damage to their red blood cells.
Alder buckthorn Frangula alnus
This plant is considered toxic to pets if ingested, so keep it away from curious cats and dogs.
Aloe vera Aloe variegata
This plant is toxic to cats and dogs if ingested.
Aloe Vera Aloe vera
This plant is toxic to cats and dogs if ingested.
Alpine delphinium Delphinium elatum
This plant is toxic to cats and dogs if ingested.
Amaryllis Hippeastrum reginae
This plant is toxic to cats and dogs if ingested, causing vomiting and diarrhea.
American elderberry Sambucus canadensis
The leaves, stems, and roots contain cyanogenic glycosides and are toxic to cats and dogs if ingested.
American holly Ilex opaca
The berries and leaves are toxic to cats and dogs if ingested.
American pokeweed Phytolacca americana
This plant is toxic to cats and dogs if consumed.
American senna Senna hebecarpa
This plant is considered toxic to cats and dogs if ingested.
Amur honeysuckle Lonicera maackii
The berries may cause mild gastrointestinal upset if ingested by cats or dogs.
Anemone clematis Clematis montana
This plant is considered toxic to cats and dogs if ingested.
Angelica
This plant can cause skin irritation in pets if they brush against it or ingest parts of it.
Antelope horns Asclepias asperula
This plant contains cardiac glycosides and is toxic to cats and dogs if ingested.
Anthurium Anthurium andraeanum
This plant is toxic to cats and dogs if ingested, as it contains calcium oxalate crystals.
Apricot Prunus armeniaca
The seeds, leaves, and stems contain cyanogenic glycosides which are toxic to cats and dogs if ingested.
Arborvitae Thuja
Thuja can be toxic to cats and dogs if ingested, potentially causing digestive upset.
Arrowhead Vine Syngonium podophyllum
This plant is toxic to cats and dogs if ingested.
Ashoka tree Saraca asoca
There is no evidence suggesting this plant is toxic to cats or dogs.
Ashwagandha Withania somnifera
This plant is considered toxic to cats and dogs if ingested.
Asparagus fern Asparagus densiflorus
The berries and foliage are toxic to cats and dogs if ingested.
Australian umbrella tree Schefflera actinophylla
This plant is toxic to cats and dogs if ingested.
Autumn Crocus Colchicum autumnale
This plant is highly toxic to both cats and dogs if consumed.
Avocado Persea americana
The leaves, fruit, and bark contain persin, which can be toxic to cats and dogs if ingested.

B

Balloon plant Gomphocarpus physocarpus
This plant contains cardiac glycosides and is considered toxic to cats and dogs if ingested.
Banyan tree Ficus benghalensis
This plant is toxic to cats and dogs if ingested.
Barrel Cactus Ferocactus
The sharp spines can cause physical injury to curious pets, though the plant is not chemically toxic.
Bay Laurel Laurus nobilis
The ASPCA lists Bay Laurel as toxic to cats and dogs. Its essential oils can cause vomiting and diarrhea if the leaves are eaten, so keep pets from chewing...
Beach spider lily Hymenocallis littoralis
This plant is considered toxic to cats and dogs if ingested.
Bear's Paw Cotyledon tomentosa
This plant is toxic to cats and dogs if ingested.
Bearberry cotoneaster Cotoneaster dammeri
The berries may cause mild gastrointestinal upset if ingested by cats or dogs.
Bearded Iris Iris germanica
The rhizomes and leaves are toxic to cats and dogs if ingested.
Begonia
Begonias are toxic to cats and dogs if ingested, as they contain soluble calcium oxalates.
Begonia Begonia × tuberhybrida
This plant is toxic to cats and dogs if ingested.
Bicolor Song of India Dracaena cylindrica
This plant is toxic to cats and dogs if ingested.
Bigleaf Hydrangea Hydrangea
This plant is toxic to cats and dogs if ingested.
Bigleaf Hydrangea Hydrangea macrophylla
This plant is toxic to cats and dogs if ingested, as it contains cyanogenic glycosides.
Bird of paradise Strelitzia reginae
This plant is toxic to cats and dogs if ingested.
Bitter Melon Momordica charantia
The plant contains compounds that can be harmful to pets if ingested in large quantities.
Bitter sneezeweed Helenium amarum
This plant is considered toxic to cats and dogs if ingested.
bittersweet nightshade Solanum dulcamara
This plant is toxic to cats and dogs if ingested.
Black Bryony Dioscorea communis
This plant is toxic to cats and dogs if ingested, causing severe irritation and digestive upset.
Black cherry Prunus serotina
The leaves, twigs, and bark contain cyanogenic glycosides which are toxic to cats and dogs if ingested.
Black henbane Hyoscyamus niger
This plant is extremely toxic to cats and dogs if ingested and can cause severe illness or death.
Black Locust Robinia pseudoacacia
This plant is toxic to cats and dogs if ingested, as it contains proteins that can cause gastrointestinal distress.
Black nightshade Solanum nigrum
This plant is toxic to cats and dogs if ingested.
Black willow Salix nigra
The bark and leaves contain salicin, which can be toxic to cats and dogs if ingested.
Blackthorn Prunus spinosa
The foliage and seeds contain cyanogenic glycosides which can be toxic to cats and dogs if ingested.
Blood lily Scadoxus multiflorus
This plant is toxic to cats and dogs if ingested.
Bloodroot Sanguinaria canadensis
This plant is toxic to cats and dogs if ingested.
Blue plantain lily Hosta ventricosa
This plant is considered toxic to cats and dogs if ingested.
Bluebell Hyacinthoides non-scripta
This plant is toxic to cats and dogs if ingested.
Blushing Philodendron Philodendron erubescens
This plant is toxic to cats and dogs if ingested.
Bodhi tree Ficus religiosa
This plant is toxic to cats and dogs if ingested.
Bog asphodel Narthecium ossifragum
This plant is considered toxic to sheep and potentially other grazing animals if ingested.
Bog rosemary Andromeda polifolia
This plant is toxic to cats and dogs if ingested.
Boston ivy Parthenocissus tricuspidata
This plant contains calcium oxalate crystals which can cause irritation if ingested by cats or dogs.
Bougainvillea
The sap can cause skin irritation, and the thorns may cause injury to curious pets.
Bougainvillea Bougainvillea glabra
The sap can cause mild skin irritation and stomach upset if ingested by cats or dogs.
Boxwood Buxus
This plant is toxic to cats and dogs if ingested.
Bracken Pteridium aquilinum
This plant is considered toxic to cats and dogs if ingested.
Broad-leaved dock Rumex obtusifolius
This plant contains soluble oxalates which can be toxic to cats and dogs if ingested in large quantities.
Broom Genista
This plant is considered toxic to cats and dogs if chewed or swallowed, especially the seeds and pods, which contain alkaloids that can cause vomiting and...
Browallia Browallia americana
This plant belongs to the nightshade family and contains alkaloids, so treat it as potentially toxic to cats and dogs and keep pets from chewing it.
Buddha's hand Citrus medica
Like other citrus plants, this plant is considered toxic to cats and dogs. The essential oils and psoralens, found mainly in the rind but also in the leaves...
Bugbane Actaea simplex
This plant is considered toxic to cats and dogs if ingested.
bulbous buttercup Ranunculus bulbosus
This plant is toxic to cats and dogs if ingested, as it contains compounds that can cause irritation.
Bunny Ears Cactus Opuntia microdasys
The tiny, hair-like glochids can cause significant irritation to the skin and mouth of pets if touched or ingested.
Burning bush Euonymus alatus
This plant is considered toxic to cats and dogs if ingested.
Butterfly weed Asclepias tuberosa
This plant contains cardiac glycosides and is toxic to cats and dogs if ingested.
Buttonbush Cephalanthus occidentalis
This plant is considered toxic to cats and dogs if ingested.

C

Cabbage tree Cordyline australis
This plant contains saponins and is considered mildly toxic to cats and dogs. Eating the leaves can cause vomiting, drooling and loss of appetite.
Cacao Theobroma cacao
Theobromine in the plant is toxic to cats and dogs if ingested.
Caladium Caladium bicolor
This plant is toxic to cats and dogs if ingested, causing oral irritation and swelling.
California sagebrush Artemisia californica
This plant contains thujone and aromatic oils and may cause vomiting or digestive upset in cats and dogs if eaten, so keep pets from chewing it.
Calla Lily Zantedeschia aethiopica
This plant is toxic to cats and dogs if ingested as it contains calcium oxalate crystals.
Candelabra Spurge Euphorbia lactea
The milky sap is highly toxic to cats and dogs if ingested or touched.
Cannabis Cannabis sativa
Cannabis is toxic to cats and dogs if ingested.
Cape Aloe Aloe ferox
This plant is toxic to cats and dogs if ingested, potentially causing vomiting or diarrhea.
Cape Gooseberry Physalis peruviana
The unripe fruit and foliage are toxic to cats and dogs if ingested.
Cape Speckled Aloe Aloe saponaria
This plant is toxic to cats and dogs if ingested.
Cardinal flower Lobelia cardinalis
This plant is toxic to cats and dogs if ingested.
Carnation Dianthus caryophyllus
This plant is mildly toxic to cats and dogs if ingested, potentially causing gastrointestinal upset.
Carolina horsenettle Solanum carolinense
This plant is toxic to cats and dogs if ingested due to the presence of solanine.
Cashew Anacardium occidentale
The shell of the cashew nut contains urushiol, which can cause skin irritation and is toxic if ingested by pets.
Cassava Manihot esculenta
This plant contains cyanogenic glycosides and is toxic to cats and dogs if ingested.
Castor bean Ricinus communis
This plant is extremely toxic to cats and dogs if ingested.
Catmint Nepeta
The ASPCA lists catnip as toxic to cats and dogs, though the effects are usually mild. Eating large amounts can cause vomiting and diarrhea and may make...
Century plant Agave americana
This plant is toxic to cats and dogs if ingested, as it contains calcium oxalate crystals.
Chenille plant Acalypha hispida
This plant is toxic to cats and dogs if ingested.
Cherimoya Annona cherimola
The seeds and leaves contain annonacin, which is toxic to cats and dogs if ingested.
Cherry laurel Prunus laurocerasus
This plant is toxic to cats and dogs if ingested due to cyanogenic glycosides.
Cherry plum Prunus cerasifera
The leaves and stems contain cyanogenic glycosides which are toxic to cats and dogs if ingested.
Chili pepper Capsicum
The plant is generally considered safe, but the capsaicin in the fruit can cause irritation if ingested by pets.
China pink Dianthus chinensis
This plant is considered mildly toxic to cats and dogs if ingested.
Chinese Banyan Ficus microcarpa
This plant is toxic to cats and dogs if ingested.
Chinese Evergreen Aglaonema
This plant is toxic to cats and dogs if ingested, causing irritation and swelling.
Chinese Evergreen Aglaonema commutatum 'Siam Aurora'
This plant is toxic to cats and dogs if ingested.
Chinese holly Ilex cornuta
The berries and leaves are considered toxic to cats and dogs if ingested.
Chinese privet Ligustrum sinense
This plant is toxic to cats and dogs if ingested, potentially causing gastrointestinal upset.
Chinese tallow Triadica sebifera
The leaves and fruit are toxic to dogs and cats if ingested.
Chinese wisteria Wisteria sinensis
All parts of this plant are toxic to cats and dogs if ingested.
Chinese Wisteria Wisteria
All parts of the wisteria plant are toxic to cats and dogs if ingested.
Chives Allium schoenoprasum
Chives are toxic to cats and dogs as they contain compounds that can damage red blood cells.
Chokecherry Prunus virginiana
The leaves, stems, and seeds contain cyanogenic glycosides which are toxic to cats and dogs if ingested.
Christmas rose Helleborus niger
This plant is toxic to cats and dogs if ingested.
Chrysanthemum
These plants are toxic to cats and dogs if ingested.
Chrysanthemum Chrysanthemum × morifolium
This plant is toxic to cats and dogs if ingested, potentially causing vomiting or skin irritation.
Cider gum Eucalyptus gunnii
This plant is toxic to cats and dogs if ingested.
Citrus
The essential oils in citrus plants can cause irritation or digestive upset if ingested by cats or dogs.
Clematis
This plant is considered toxic to cats and dogs if ingested.
Climbing Aloe Aloiampelos ciliaris
This plant is considered toxic to cats and dogs if ingested.
Climbing hydrangea Hydrangea anomala
This plant is considered mildly toxic to cats and dogs if ingested.
clustered dock Rumex conglomeratus
This plant contains soluble oxalates which can be harmful to cats and dogs if ingested in large quantities.
Coffee plant Coffea
The coffee plant is toxic to cats and dogs if ingested.
Coffee plant Coffea arabica
The coffee plant is considered toxic to cats and dogs if ingested.
Coleus Plectranthus scutellarioides
Coleus is toxic to cats and dogs if ingested.
Coltsfoot Tussilago farfara
This plant is considered toxic to cats and dogs if ingested.
Comfrey Symphytum officinale
This plant can be toxic to cats and dogs if ingested in large quantities due to pyrrolizidine alkaloids.
Common agapanthus Agapanthus praecox
This plant is toxic to cats and dogs if ingested.
Common asparagus fern Asparagus setaceus
This plant is toxic to cats and dogs if ingested, causing gastrointestinal upset or skin irritation.
Common boneset Eupatorium perfoliatum
This plant is considered toxic to cats and dogs if ingested.
Common box Buxus sempervirens
This plant is toxic to cats and dogs if ingested.
Common buckthorn Rhamnus cathartica
The berries and foliage are toxic to pets if ingested, causing gastrointestinal distress.
Common Fumitory Fumaria officinalis
This plant contains isoquinoline alkaloids and should be treated as potentially toxic to cats and dogs if eaten, so keep pets from chewing it.
Common groundsel Senecio vulgaris
This plant is toxic to cats and dogs if ingested due to pyrrolizidine alkaloids.
Common hogweed Heracleum sphondylium
This plant can cause skin irritation in pets due to its sap, so it is best to keep them away.
Common honeysuckle Lonicera periclymenum
The berries can be mildly toxic to cats and dogs if ingested in large quantities.
Common Milkweed Asclepias syriaca
This plant is toxic to cats and dogs if ingested due to cardiac glycosides.
Common morning glory Ipomoea purpurea
This plant is toxic to cats and dogs if ingested.
Common Purslane Portulaca oleracea
This plant is toxic to cats and dogs. It contains soluble calcium oxalates, and eating it can cause drooling, tremors and, in larger amounts, kidney damage....
Common ragwort Jacobaea vulgaris
This plant is toxic to cats and dogs if ingested, as it contains pyrrolizidine alkaloids that can cause liver damage.
Common Rue Ruta graveolens
This plant can be irritating to pets if ingested or touched due to its volatile oils.
Common sneezeweed Helenium autumnale
This plant is considered toxic to dogs and cats if ingested.
Common soapwort Saponaria officinalis
This plant is considered toxic to cats and dogs if ingested.
Common water plantain Alisma plantago-aquatica
The fresh plant contains acrid, irritating compounds and is considered mildly toxic. Chewing or eating it may cause mouth irritation and stomach upset in...
Coralberry Symphoricarpos orbiculatus
The berries are considered mildly toxic to cats and dogs if ingested in large quantities.
Corn Cockle Agrostemma githago
This plant is toxic to cats and dogs if ingested, as it contains saponins that can cause digestive distress.
Corn Plant Dracaena fragrans
This plant is toxic to cats and dogs if ingested.
Cow parsnip Heracleum maximum
This plant can cause skin irritation or photosensitivity in pets if they brush against the sap.
Cowslip Primula veris
This plant is considered toxic to cats and dogs if ingested.
Creeping buttercup Ranunculus repens
This plant is toxic to cats and dogs if ingested.
Creeping Fig Ficus pumila
This plant is mildly toxic to cats and dogs. Its milky sap can irritate the mouth and skin, and chewing the leaves or stems may cause drooling, vomiting or...
Creeping Oxalis Oxalis corniculata
This plant is toxic to cats and dogs due to its high concentration of soluble calcium oxalates.
Creeping Spurge Euphorbia serpens
The milky sap is toxic to cats and dogs if ingested or if it contacts their skin.
Croton Codiaeum variegatum
This plant is toxic to cats and dogs if ingested, causing irritation and digestive upset.
Crown Imperial Fritillaria imperialis
This plant is considered toxic to cats and dogs if ingested.
Crown of Thorns Euphorbia milii
This plant is toxic to cats and dogs if ingested and its sap can cause skin irritation.
Crown vetch Securigera varia
This plant is considered toxic to horses and potentially other livestock if ingested in large quantities.
Crowpoison Nothoscordum bivalve
This plant is considered toxic to cats and dogs if ingested.
curly dock Rumex crispus
This plant contains soluble oxalates which can be toxic to cats and dogs if ingested in large quantities.
Cylindrical Snake Plant Sansevieria cylindrica
This plant is toxic to cats and dogs if ingested.

D

Daffodil Narcissus
All parts of Narcissus are toxic to cats and dogs if ingested, especially the bulbs. Eating them can cause vomiting, diarrhea or drooling, and large amounts...
Daffodil Narcissus pseudonarcissus
Daffodils are toxic to cats and dogs if ingested, causing vomiting and diarrhea.
Dahlia Dahlia pinnata
Dahlias are considered toxic to cats and dogs if ingested, potentially causing skin irritation or digestive upset.
Daylily Hemerocallis
Daylilies are highly toxic to cats and can cause kidney failure if ingested.
Deadly nightshade Atropa belladonna
This plant is extremely toxic to both cats and dogs if consumed.
Desert Rose Adenium obesum
This plant is toxic to cats and dogs if ingested.
Devil's apple Solanum linnaeanum
This plant is highly toxic to cats and dogs if ingested.
Dog's mercury Mercurialis perennis
This plant is toxic to cats and dogs if ingested, causing gastrointestinal distress.
Dragon arum Dracunculus vulgaris
This plant is toxic to cats and dogs if ingested.
Dragon blood tree Dracaena cinnabari
This plant is considered toxic to cats and dogs if ingested.
Dragon Scale Alocasia Alocasia baginda
This plant is toxic to cats and dogs if ingested due to insoluble calcium oxalates.
Dragon tree Dracaena
These plants are toxic to cats and dogs if ingested.
Dragon Tree Dracaena marginata
This plant is toxic to cats and dogs if ingested.
Dumb Cane Dieffenbachia seguine
This plant is toxic to cats and dogs if ingested due to calcium oxalate crystals.
Dutchman's breeches Dicentra cucullaria
This plant is toxic to cats and dogs if ingested, as it contains isoquinoline alkaloids.
Dutchman's pipe Isotrema macrophyllum
This plant is considered toxic to cats and dogs if ingested.

E

Early crocus Crocus tommasinianus
This plant is mildly toxic to cats and dogs. Eating it, especially the corms, can cause vomiting and diarrhea.
Eastern gladiolus Gladiolus communis
This plant is considered toxic to cats and dogs if ingested.
Eastern red cedar Juniperus virginiana
The foliage and berries can be toxic to cats and dogs if ingested in large quantities.
Edging lobelia Lobelia erinus
This plant is toxic to cats and dogs if ingested.
Elder Sambucus nigra
The leaves, stems, and unripe berries are toxic to cats and dogs if ingested.
Elderberry Sambucus
The leaves, stems, and roots are toxic to cats and dogs if ingested.
Elephant Ear Alocasia
This plant is toxic to cats and dogs if ingested due to calcium oxalate crystals.
Elephant Ear Colocasia
This plant is toxic to cats and dogs if ingested due to insoluble calcium oxalate crystals.
English Holly Ilex aquifolium
The berries are considered toxic to cats and dogs if ingested.
English Ivy Hedera helix
This plant is toxic to cats and dogs if ingested, causing vomiting and drooling.
English lavender Lavandula angustifolia
Lavender is toxic to cats and dogs if ingested in large quantities.
English walnut Juglans regia
The husks and nuts contain juglone, which can be toxic to dogs if ingested in large quantities.
English yew Taxus baccata
This plant is highly toxic to cats and dogs if ingested.
Eucalyptus
Eucalyptus is toxic to cats and dogs if ingested, causing drooling, vomiting, or diarrhea.
European plum Prunus domestica
The leaves and stems contain cyanogenic glycosides which are toxic to cats and dogs if ingested.
European privet Ligustrum vulgare
The berries and leaves are toxic to cats and dogs if ingested.

F

Feverfew Tanacetum parthenium
This plant is toxic to cats and dogs. If eaten, it can cause vomiting, diarrhea and skin irritation, and eating it over a long period may lead to bleeding...
Fiddle Leaf Fig Ficus lyrata
This plant is toxic to cats and dogs if ingested.
Field bindweed Convolvulus arvensis
This plant is considered mildly toxic to cats and dogs if ingested.
Field horsetail Equisetum arvense
This plant is toxic to cats and dogs if ingested.
Field Poppy Papaver rhoeas
This plant is considered mildly toxic to cats and dogs if ingested.
Fig Ficus elastica 'Burgundy'
Ficus plants contain sap that is toxic to cats and dogs if ingested or touched.
Fig Ficus carica
The milky sap can cause irritation to the skin and mouth of cats and dogs if ingested or touched.
Fire Stick Euphorbia tirucalli
The milky sap is highly toxic to cats and dogs if ingested or touched.
Firethorn Pyracantha coccinea
The berries can cause mild stomach upset if ingested by cats or dogs.
Fish poison tree Barringtonia asiatica
The seeds and other parts of this plant are toxic to both cats and dogs if ingested.
Flame tree Delonix regia
This plant is considered toxic to cats and dogs if ingested.
Flamingo Flower Anthurium
This plant is toxic to cats and dogs if ingested, causing irritation to the mouth and digestive tract.
Florist's cyclamen Cyclamen persicum
This plant is toxic to cats and dogs if ingested, potentially causing vomiting or heart rhythm issues.
Flowering Crabapple Malus × domestica
The seeds and foliage contain cyanogenic glycosides which can be harmful if ingested in large quantities.
Flowering Spurge Euphorbia corollata
This plant is toxic to cats and dogs if ingested and the sap can cause skin irritation.
Flowering Tobacco Nicotiana alata
This plant is toxic to cats and dogs if ingested.
Four o'clock flower Mirabilis jalapa
This plant is considered toxic to cats and dogs if ingested.
Foxglove Digitalis purpurea
This plant is toxic to cats and dogs if ingested.
foxtail barley Hordeum jubatum
The plant is not chemically toxic, but the sharp, barbed awns can lodge in a pet's eyes, ears, nose, paws, mouth or skin and migrate deeper, causing pain,...
Fragrant plantain lily Hosta plantaginea
This plant is toxic to cats and dogs if ingested.
Frangipani Plumeria
The milky sap is toxic to cats and dogs if ingested or touched.
Frangipani Plumeria rubra
This plant is toxic to cats and dogs if ingested, as it contains compounds that can cause stomach upset.
Fraser photinia Photinia x fraseri
The leaves, especially the young red growth, and the seeds contain cyanogenic glycosides, which can be harmful to cats and dogs if chewed or eaten in...
French lavender Lavandula stoechas
This plant is generally considered toxic to cats and dogs if ingested.

G

Garden Angelica Angelica archangelica
This plant can cause skin irritation or digestive upset if ingested by cats or dogs.
Garden asparagus Asparagus officinalis
The berries and foliage of this plant are toxic to cats and dogs.
Garden sorrel Rumex acetosa
This plant contains soluble calcium oxalates which can be toxic to cats and dogs if ingested in large quantities.
Garden star of Bethlehem Ornithogalum umbellatum
This plant is toxic to cats and dogs if ingested.
Gardenia
Gardenias are toxic to cats and dogs if ingested, potentially causing vomiting or diarrhea.
Gardenia Gardenia jasminoides
Gardenias are toxic to both cats and dogs if ingested.
Geranium Pelargonium
These plants are toxic to cats and dogs if ingested.
Geranium Pelargonium x hortorum
This plant is toxic to cats and dogs if ingested.
Geranium Pelargonium zonale
This plant is toxic to cats and dogs if ingested.
Giant Hogweed Heracleum mantegazzianum
The sap is toxic to both cats and dogs, causing severe blistering and skin inflammation upon contact.
Giant Onion Allium giganteum
This plant is toxic to cats and dogs if ingested.
Giant spider lily Crinum asiaticum
This plant is toxic to cats and dogs if ingested.
Giant Taro Alocasia macrorrhizos
This plant is toxic to cats and dogs if ingested.
Giant white bird of paradise Strelitzia nicolai
This plant is considered mildly toxic to cats and dogs if ingested.
Ginkgo Ginkgo biloba
The seeds and leaves can be toxic to cats and dogs if ingested.
Glory lily Gloriosa superba
This plant is highly toxic to cats and dogs if ingested.
Golden Pothos Epipremnum aureum
This plant is toxic to cats and dogs if ingested.
Golden trumpet Allamanda cathartica
This plant is toxic to cats and dogs if ingested, as it contains compounds that can cause digestive upset.
Grape Vitis vinifera
Grapes and raisins are highly toxic to dogs and cats and can cause kidney failure.
Grape Hyacinth Muscari armeniacum
This plant is considered mildly toxic to cats and dogs if ingested.
Great blue lobelia Lobelia siphilitica
This plant is considered toxic to cats and dogs if ingested.
Greater celandine Chelidonium majus
This plant is considered toxic to cats and dogs if ingested, as it contains alkaloids that can cause irritation.
Green antelopehorn Asclepias viridis
This plant contains cardiac glycosides and is toxic to cats and dogs if ingested.
Ground Ivy Glechoma hederacea
This plant is considered toxic to horses and can cause mild irritation in cats and dogs if ingested.
Groundsel Senecio peregrinus
This plant is toxic to cats and dogs if ingested.
Guelder rose Viburnum opulus
The berries can cause stomach upset if ingested by cats or dogs.

H

hairy vetch Vicia villosa
This plant is not known to be a serious risk to dogs and cats, but ingestion of large amounts of any legume can cause mild digestive upset. It is toxic to...
Hawaiian baby woodrose Argyreia nervosa
This plant is considered toxic to cats and dogs if ingested.
Heartleaf Philodendron Philodendron hederaceum var. hederaceum
This plant is toxic to cats and dogs if ingested.
Heavenly bamboo Nandina domestica
This plant is toxic to cats and dogs if ingested.
Hemlock water dropwort Oenanthe crocata
This plant is extremely toxic to both cats and dogs if ingested.
Hemp-agrimony Eupatorium cannabinum
This plant is considered toxic to cats and dogs if ingested.
Hepatica Hepatica nobilis
This plant is considered toxic to cats and dogs if ingested.
Holly Ilex
The berries and leaves are toxic to cats and dogs if ingested.
Honey locust Gleditsia triacanthos
The seeds and pods can be toxic to pets if ingested in large quantities.
Hops Humulus lupulus
Hops are toxic to dogs and can cause malignant hyperthermia if ingested.
Horse chestnut Aesculus hippocastanum
The seeds, leaves, and bark contain aesculin which is toxic to cats and dogs if ingested.
Hot lips Palicourea elata
This plant is considered toxic to cats and dogs if ingested.
Hyacinth Hyacinthus orientalis
The bulbs contain calcium oxalate crystals which can cause significant irritation if ingested by cats or dogs.

I

Iceland Poppy Papaver nudicaule
This plant is considered toxic to cats and dogs if ingested.
Indian hemp Apocynum cannabinum
This plant is toxic to cats and dogs if ingested due to cardiac glycosides.
Indian tobacco Lobelia inflata
This plant is toxic to cats and dogs if ingested.
Italian arum Arum italicum
This plant is toxic to cats and dogs if ingested, as it contains calcium oxalate crystals that cause irritation.
Italian leather flower Clematis viticella
This plant is considered toxic to cats and dogs if ingested.
Ivy-leaved cyclamen Cyclamen hederifolium
This plant is toxic to cats and dogs if ingested.
Ivy-leaved geranium Pelargonium peltatum
This plant is toxic to cats and dogs if ingested.

J

Jacaranda Jacaranda mimosifolia
The plant is considered mildly toxic to cats and dogs if ingested.
Jack-in-the-pulpit Arisaema triphyllum
This plant is toxic to cats and dogs due to calcium oxalate crystals.
Jade plant Crassula ovata 'Gollum'
This plant is toxic to cats and dogs if ingested.
Jade Plant Crassula ovata
The jade plant is toxic to cats and dogs if ingested.
Japanese andromeda Pieris japonica
This plant is toxic to cats and dogs if ingested due to grayanotoxins.
Japanese aralia Fatsia japonica
This plant is considered mildly toxic to cats and dogs if ingested.
Japanese barberry Berberis thunbergii
This plant is considered mildly toxic to cats and dogs if ingested.
Japanese holly Ilex crenata
The berries can be mildly toxic to cats and dogs if ingested.
Japanese honeysuckle Lonicera japonica
The berries and leaves can be toxic to cats and dogs if ingested.
Japanese skimmia Skimmia japonica
All parts of this plant are considered toxic to cats and dogs if ingested.
Japanese spindle Euonymus japonicus
This plant is considered toxic to cats and dogs if ingested.
Japanese wisteria Wisteria floribunda
All parts of this plant are toxic to cats and dogs if ingested.
Jatropha
This plant is toxic to cats and dogs if ingested, as it contains compounds that can cause severe irritation.
Jícama Pachyrhizus erosus
The seeds, stems, and leaves contain rotenone and are toxic to pets.
Jimsonweed Datura stramonium
This plant is extremely toxic to cats and dogs if ingested.
Johnsongrass Sorghum halepense
This plant can be toxic to livestock and pets if it contains high levels of cyanogenic glycosides, especially after frost or drought.
Joshua tree Yucca brevifolia
This plant is considered toxic to cats and dogs if ingested.

K

Kaffir Lily Clivia miniata
This plant is toxic to cats and dogs if ingested.
Kalanchoe
This plant is toxic to cats and dogs if ingested.
Kalanchoe Kalanchoe blossfeldiana
This plant is toxic to cats and dogs if ingested.
Key lime Citrus aurantiifolia
The essential oils in the leaves and fruit can cause irritation if ingested by cats or dogs.
kidneyleaf buttercup Ranunculus abortivus
This plant is toxic to cats and dogs if ingested.

L

Labrador Tea Rhododendron groenlandicum
This plant is considered toxic to cats and dogs if ingested.
Lantana Lantana camara
This plant is toxic to cats and dogs if ingested, so keep it away from curious pets.
Large-leaved lupine Lupinus polyphyllus
This plant is considered toxic to cats and dogs if ingested.
Late flowering thoroughwort Eupatorium serotinum
This plant is generally considered toxic to cats and dogs if ingested.
Lavender Lavandula
Lavender is toxic to cats and dogs if ingested in large quantities.
Leek Allium ampeloprasum
Leeks are toxic to cats and dogs as they contain compounds that can damage red blood cells.
Lemon Citrus limon
Citrus oils and plant parts can cause irritation or digestive upset if ingested by cats or dogs.
Lemon scented gum Corymbia citriodora
The leaves and their essential oil are toxic to cats and dogs. Chewing or eating the leaves can cause drooling, vomiting, diarrhea and weakness.
Lemon verbena Aloysia citrodora
The ASPCA lists lemon verbena as toxic to cats, dogs and horses because of the essential oils in the plant. Eating it can cause vomiting and diarrhea in...
Lemongrass Cymbopogon citratus
This plant is listed by the ASPCA as toxic to cats and dogs. Its essential oils and cyanogenic glycosides can cause vomiting and diarrhea, and ingestion of...
Lenten rose Helleborus orientalis
This plant is toxic to cats and dogs if ingested, as it contains cardiac glycosides.
Lesser celandine Ficaria verna
This plant is toxic to cats and dogs if ingested.
Lesser spearwort Ranunculus flammula
This plant contains ranunculin, which can cause irritation or digestive upset if ingested by cats or dogs.
Lily Lilium
Lilies are highly toxic to cats and can cause severe kidney failure if ingested.
Lily of the Valley Convallaria majalis
This plant is highly toxic to cats and dogs if ingested.
Littleleaf boxwood Buxus microphylla
This plant is toxic to cats and dogs if ingested.
Loquat Eriobotrya japonica
The seeds of the loquat contain cyanogenic glycosides which are toxic to cats and dogs if ingested.
Lords and Ladies Arum maculatum
This plant is toxic to cats and dogs if ingested due to calcium oxalate crystals.
Lucky Bamboo Dracaena sanderiana
This plant is toxic to cats and dogs if ingested.

M

Maiden pink Dianthus deltoides
Like its relative the carnation, this plant is considered mildly toxic to cats and dogs. Eating it may cause mild stomach upset, and contact may cause mild...
Male fern Dryopteris filix-mas
This plant is considered toxic to cats and dogs. The rhizomes, and to a lesser degree the fronds, contain filicin, which can cause vomiting, diarrhea and...
Mandarin orange Citrus reticulata
The essential oils in this plant can be irritating to cats and dogs if ingested or touched.
Mandevilla Mandevilla sanderi
The milky sap is toxic to cats and dogs if ingested.
Mango Mangifera indica
Mango leaves and skin contain urushiol, which can cause skin irritation or gastrointestinal upset in pets.
Marigold Tagetes
Marigolds can cause mild skin irritation or digestive upset if ingested by cats or dogs.
marsh horsetail Equisetum palustre
This plant is toxic to cats and dogs if ingested due to the presence of thiaminase and silica.
Marsh marigold Caltha palustris
This plant is considered toxic to cats and dogs if ingested.
Mayapple Podophyllum peltatum
All parts of this plant are toxic to cats and dogs if ingested.
Meadow buttercup Ranunculus acris
This plant is toxic to cats and dogs if ingested.
Meadow vetchling Lathyrus pratensis
The seeds and pods contain compounds that can be harmful to cats and dogs if eaten in quantity, as with the related sweet pea. Keep pets from chewing the...
Mélisse Melissa officinalis
The ASPCA lists it as toxic to cats, dogs and horses because of its essential oils. Eating it can cause vomiting, diarrhea and lethargy, and larger amounts...
Mexican mint Plectranthus amboinicus
This plant is considered toxic to cats and dogs if ingested.
Mexican orange blossom Choisya ternata
This plant is considered toxic to cats and dogs if ingested.
Milkweed Asclepias
Milkweed is toxic to cats and dogs if ingested due to cardiac glycosides.
Mint Mentha
The ASPCA lists mint as toxic to cats and dogs, though eating it usually causes only mild stomach upset such as vomiting or diarrhea. Pennyroyal (Mentha...
Monstera Adansonii Monstera adansonii
This plant is toxic to cats and dogs if ingested.
Morning Glory Ipomoea
These plants are toxic to cats and dogs if ingested.
Moss rose Portulaca grandiflora
This plant is considered toxic to cats and dogs if ingested.
Mother of Thousands Kalanchoe daigremontiana
This plant is toxic to cats and dogs if ingested.
Mountain Aloe Aloe marlothii
This plant is toxic to cats and dogs if ingested.
Mountain Laurel Kalmia latifolia
This plant is highly toxic to cats and dogs if ingested.
Mugwort Artemisia vulgaris
This plant is generally considered toxic to cats and dogs if ingested in large quantities.

N

Neem Azadirachta indica
Neem oil and plant parts can be toxic to cats and dogs if ingested in large quantities.
Neon Philodendron Philodendron hederaceum
This plant is toxic to cats and dogs if ingested.
Netted iris Iris reticulata
This plant is toxic to cats and dogs if ingested.
Night blooming jasmine Cestrum nocturnum
All parts of this plant are toxic to cats and dogs if ingested.
Northern red oak Quercus rubra
The leaves and acorns contain tannins that are toxic to dogs and cats. Eating them usually causes stomach upset such as vomiting and diarrhea, and large...
Northern white cedar Thuja occidentalis
The foliage contains thujone and is considered mildly toxic to cats and dogs. Eating it can cause vomiting and diarrhea.
Nutmeg Myristica fragrans
The seeds and oils can be toxic to cats and dogs if ingested in large quantities.

O

Oak Quercus
Acorns contain tannins that are toxic to cats and dogs if ingested in large quantities.
Oleander Nerium oleander
This plant is highly toxic to cats and dogs if ingested and can cause severe illness.
Onion Allium cepa
Onions are toxic to cats and dogs as they can cause damage to red blood cells.
Opium poppy Papaver somniferum
This plant is toxic to cats and dogs if ingested.
Oregano Origanum vulgare
The ASPCA lists this plant as toxic to cats and dogs. Its essential oils can cause vomiting and diarrhea if pets eat the leaves, though symptoms are usually...
Oriental bittersweet Celastrus orbiculatus
The berries and foliage can be toxic to cats and dogs if ingested.
Ornamental Onion Allium
This plant is toxic to cats and dogs if ingested.

P

Pacific poison oak Toxicodendron diversilobum
Dogs and cats rarely get a rash from this plant because their fur protects their skin, though thinly furred areas like the belly or nose can react. The...
Paddle Plant Kalanchoe thyrsiflora
This plant is toxic to cats and dogs if ingested.
Pagoda flower Clerodendrum paniculatum
This plant is generally considered toxic to cats and dogs if ingested.
Pampas Grass Cortaderia selloana
The sharp, serrated leaf edges can cause physical injury to pets, though it is not chemically toxic.
Panda plant Kalanchoe tomentosa
This plant is toxic to cats and dogs if ingested.
Panicle Hydrangea Hydrangea paniculata
This plant is considered mildly toxic to cats and dogs if ingested.
Paperwhite Narcissus Narcissus papyraceus
This plant is toxic to cats and dogs if ingested, potentially causing vomiting or diarrhea.
Parrot flower Impatiens psittacina
This plant is considered toxic to cats and dogs if ingested.
Parsley Petroselinum crispum
Parsley is toxic to cats and dogs if ingested in large quantities due to furanocoumarins.
Pasque flower Pulsatilla vulgaris
This plant is considered toxic to cats and dogs if ingested.
Passion Flower Passiflora
The foliage and stems can be toxic to cats and dogs if ingested.
Passion Fruit Passiflora edulis
The foliage and stems can be toxic to cats and dogs if ingested in large quantities.
Peace Lily Spathiphyllum wallisii
This plant is toxic to cats and dogs if ingested due to insoluble calcium oxalates.
Peach tree Prunus persica
The leaves, stems, and seeds contain cyanogenic glycosides which are toxic to cats and dogs if ingested.
Pencil flower Acalypha sp.
This plant is considered mildly toxic to cats and dogs if ingested.
Peony Paeonia
Peonies are considered mildly toxic to cats and dogs if ingested, potentially causing vomiting or diarrhea.
Peony Paeonia lactiflora
Peonies can cause mild to moderate digestive upset if ingested by cats or dogs.
Pepper plant Piper methysticum
These plants are generally considered toxic to cats and dogs if ingested.
Peppermint Mentha piperita
Peppermint can be toxic to cats and dogs if ingested in large quantities.
Perilla Perilla frutescens
Perilla frutescens is known to be toxic to cattle and horses, and it is generally best to keep it away from curious pets.
periwinkle Vinca minor
This plant is toxic to cats and dogs if ingested.
Persian buttercup Ranunculus asiaticus
This plant is toxic to cats and dogs if ingested.
Persian silk tree Albizia julibrissin
This plant is considered toxic to cats and dogs if ingested.
Peruvian torch cactus Echinopsis macrogona
This plant contains mescaline and related alkaloids, so it should be treated as toxic to cats and dogs if chewed or eaten. Signs can include vomiting,...
Petty spurge Euphorbia peplus
The milky sap is toxic to cats and dogs if ingested or if it contacts their skin.
Philodendron Birkin Philodendron 'Birkin'
This plant is toxic to cats and dogs if ingested.
Pink Afrikaner Gladiolus caryophyllaceus
This plant is considered toxic to cats and dogs if ingested.
Pittosporum
Some species may cause mild stomach upset if ingested by pets.
Planta cebra Tradescantia zebrina
This plant is mildly toxic to cats and dogs if ingested.
Plantain Lily Hosta
Hostas are toxic to cats and dogs if ingested.
Poinsettia Euphorbia pulcherrima
This plant is toxic to cats and dogs if ingested, often causing drooling or vomiting.
Poison hemlock Conium maculatum
This plant is extremely poisonous to both cats and dogs if ingested.
Poison ivy Toxicodendron radicans
This plant contains urushiol, which causes severe skin irritation and allergic reactions in humans. Dogs and cats rarely develop a rash because their fur...
Polka dot begonia Begonia maculata
This plant is toxic to cats and dogs if ingested.
Pontic rhododendron Rhododendron ponticum
All parts of this plant are highly toxic to cats and dogs if ingested.
Poppy anemone Anemone coronaria
This plant is toxic to cats and dogs if ingested, potentially causing irritation or digestive upset.
Pork and Beans Sedum rubrotinctum
This plant is toxic to cats and dogs if ingested.
Potato Solanum tuberosum
The foliage and green tubers are toxic to cats and dogs if ingested.
Potato vine Solanum laxum
This plant is toxic to cats and dogs if ingested.
Prickly Aloe Aloe aculeata
This plant is toxic to cats and dogs if ingested.
Primrose Primula vulgaris
This plant is listed by the ASPCA as toxic to cats and dogs. Eating it usually causes mild vomiting.
Purple cyclamen Cyclamen purpurascens
This plant is toxic to cats and dogs if ingested.
Purple Heart Tradescantia pallida
The sap can cause skin irritation and digestive upset if ingested by cats or dogs.
Purple Shamrock Oxalis triangularis
This plant is toxic to cats and dogs if ingested, as it contains soluble calcium oxalates.

Q

Queen Victoria Agave Agave victoriae-reginae
This plant is toxic to cats and dogs if ingested.
Quiver Tree Aloidendron dichotomum
The sap is considered toxic to cats and dogs if ingested.

R

Rainbow eucalyptus Eucalyptus deglupta
This plant is considered toxic to cats and dogs if ingested.
Ramsons Allium ursinum
This plant is toxic to cats and dogs if ingested.
Red baneberry Actaea rubra
This plant is toxic to cats and dogs if ingested, as all parts contain cardiogenic toxins.
Red elderberry Sambucus racemosa
All parts of this plant are considered toxic to cats and dogs if ingested.
Red spider lily Lycoris radiata
This plant is toxic to cats and dogs if ingested.
Red trillium Trillium erectum
This plant is not well studied in pets, but all parts contain saponins, so cats and dogs that chew the leaves, rhizome or berries may develop mild stomach...
Red-veined dock Rumex sanguineus
This plant contains oxalates which can be harmful if ingested by cats or dogs.
redroot pigweed Amaranthus retroflexus
This plant can build up nitrates and oxalates and is a known cause of poisoning in livestock such as pigs and cattle. A small nibble is unlikely to harm...
Regal Geranium Pelargonium x domesticum
This plant is toxic to cats and dogs if ingested.
Regal Lily Lilium regale
This plant is toxic to cats and can cause severe kidney failure if ingested.
Rex Begonia Begonia rex-cultorum
This plant is toxic to cats and dogs if ingested.
Rhododendron
All parts of the plant are highly toxic to cats and dogs if ingested.
Rhubarb Rheum rhabarbarum
The leaves contain soluble calcium oxalates that are toxic to cats and dogs if ingested.
Rocket larkspur Consolida ajacis
This plant is toxic to cats and dogs if ingested.
Rosary pea Abrus precatorius
This plant is extremely toxic to both cats and dogs if ingested.
Rose of Sharon Hibiscus syriacus
The Rose of Sharon is considered toxic to cats and dogs if ingested.
Rough chervil Chaerophyllum temulum
This plant is considered toxic to pets if ingested.
Rough cocklebur Xanthium strumarium
This plant is toxic to pets if ingested, causing gastrointestinal distress and potential liver damage.
Rubber Plant Ficus elastica
The plant is toxic to cats and dogs if ingested, causing irritation and vomiting.
Rubber tree Hevea brasiliensis
The milky sap is toxic to cats and dogs if ingested and can cause skin irritation.

S

Sacred Datura Datura wrightii
This plant is highly toxic to cats and dogs if ingested.
Saffron Crocus Crocus sativus
This plant is considered toxic to cats and dogs if ingested.
Sago Palm Cycas revoluta
This plant is extremely toxic to cats and dogs if ingested.
San Pedro cactus Echinopsis pachanoi
This plant contains mescaline and other alkaloids, so it can be toxic to cats and dogs if chewed or eaten. Signs can include vomiting, drooling, wobbliness...
Sandbox tree Hura crepitans
The sap of this tree is highly toxic and can cause severe irritation to pets if ingested or touched.
Sansevieria Dracaena trifasciata
This plant is toxic to cats and dogs if ingested.
Sassafras Sassafras albidum
This plant is considered toxic to cats and dogs if ingested.
Sausage tree Kigelia africana
The fruit and seeds are considered toxic to pets if ingested.
Scarlet pimpernel Lysimachia arvensis
This plant can be toxic to cats and dogs if ingested.
Scotch broom Cytisus scoparius
This plant is considered toxic to cats and dogs if ingested.
Sedum
Some species can cause mild stomach upset if ingested by pets.
Sheep sorrel Rumex acetosella
This plant contains oxalates which can be harmful to cats and dogs if ingested in large quantities.
Showy milkweed Asclepias speciosa
This plant contains cardiac glycosides and is toxic to cats and dogs if ingested.
Siberian iris Iris sibirica
This plant is considered toxic to cats and dogs if ingested.
Siberian Squill Othocallis siberica
This plant can cause digestive upset if ingested by cats or dogs.
Siebold's elderberry Sambucus sieboldiana
The berries and foliage can be toxic to cats and dogs if ingested.
Siebold's Hosta Hosta sieboldiana
This plant is toxic to cats and dogs if ingested.
Silver Philodendron Scindapsus pictus
This plant is toxic to cats and dogs if ingested.
Silver Sword Philodendron Philodendron hastatum
This plant is toxic to cats and dogs if ingested.
Silverleaf nightshade Solanum elaeagnifolium
This plant is toxic to cats and dogs if ingested.
Sims azalea Rhododendron simsii
This plant is toxic to cats and dogs if ingested.
Singapore graveyard flower Plumeria obtusa
The milky sap is toxic to cats and dogs if ingested or if it contacts their skin.
Skunk cabbage Symplocarpus foetidus
This plant is considered toxic to cats and dogs due to the presence of calcium oxalate crystals.
Slender St. John's Wort Hypericum pulchrum
This plant is considered toxic to cats and dogs if ingested.
Small-leaf spiderwort Tradescantia fluminensis
This plant is considered mildly toxic to cats and dogs if ingested.
Smooth Hydrangea Hydrangea arborescens
This plant is toxic to cats and dogs if ingested, as it contains cyanogenic glycosides.
Snakes head fritillary Fritillaria meleagris
This plant is considered toxic to cats and dogs if ingested.
Sneezewort Achillea ptarmica
This plant is considered mildly toxic to cats and dogs. Eating it may cause vomiting, diarrhea and drooling.
Snowberry Symphoricarpos albus
The berries are considered toxic to cats and dogs if ingested in large quantities.
Snowberry Symphoricarpos albus var. albus
The berries are mildly toxic to cats and dogs if ingested in large quantities.
Snowbush Breynia disticha
This plant is considered toxic to cats and dogs if ingested.
Snowdrop Galanthus nivalis
This plant is toxic to cats and dogs if ingested, potentially causing vomiting or diarrhea.
Soap Aloe Aloe maculata
This plant is toxic to cats and dogs if ingested.
Sodom Apple Calotropis procera
The milky sap is highly toxic to cats and dogs if ingested or if it contacts their skin.
Song of India Dracaena reflexa
This plant is toxic to cats and dogs if ingested.
Song of India Dracaena reflexa var. angustifolia
This plant is toxic to cats and dogs if ingested.
Sorghum Sorghum bicolor
Sorghum can be toxic to pets if they ingest large amounts of the leaves, especially when the plant is young or stressed.
Soursop Annona muricata
The seeds and leaves contain compounds that can be toxic to pets if ingested.
Spanish dagger Yucca gloriosa
This plant is toxic to cats and dogs if ingested due to saponins.
Spearmint Mentha spicata
The ASPCA lists this plant as toxic to cats, dogs and horses. Eating it, especially in larger amounts, can cause vomiting and diarrhea, which are usually mild.
Spindle Euonymus japonicus 'Aureomarginatus'
The plant is considered toxic to cats and dogs if ingested.
Spindle Euonymus europaeus
This plant is considered toxic to cats and dogs if ingested.
Spineless Yucca Yucca filamentosa
This plant contains saponins which can cause digestive upset if ingested by cats or dogs.
Spineless Yucca Yucca elephantipes
This plant is toxic to cats and dogs if ingested.
spiny amaranth Amaranthus spinosus
This plant is not considered highly toxic to cats and dogs, but it contains oxalates and can build up nitrates, so eating large amounts may cause stomach...
Spiral aloe Aloe polyphylla
This plant is toxic to cats and dogs if ingested.
Split leaf philodendron Philodendron bipinnatifidum
This plant is toxic to cats and dogs if ingested.
Spotted spurge Chamaesyce maculata
The milky sap is toxic to cats and dogs if ingested or if it contacts their skin.
spreading dogbane Apocynum androsaemifolium
This plant is toxic to cats and dogs if ingested due to the presence of cardiac glycosides.
Spring Crocus Crocus vernus
This plant is considered toxic to cats and dogs if ingested.
Square-stalked St. John's-wort Hypericum tetrapterum
This plant can be toxic to cats and dogs if ingested.
Squill Scilla sieberiana
This plant is toxic to cats and dogs if ingested.
St. John's wort Hypericum perforatum
This plant is toxic to cats, dogs, and horses if ingested.
Star of Bethlehem Ornithogalum thyrsoides
This plant is toxic to cats and dogs if ingested.
Starfruit Averrhoa carambola
Starfruit is toxic to cats, dogs and horses. Its soluble calcium oxalates can cause low blood calcium and kidney failure, so keep the fruit away from pets.
Strangler fig Ficus aurea
This plant is toxic to cats and dogs if ingested.
String of bananas Senecio radicans
This plant is toxic to cats and dogs if ingested.
String of pearls Curio rowleyanus
This plant is toxic to cats and dogs if ingested.
Sun spurge Euphorbia helioscopia
This plant is toxic to cats and dogs if ingested and the sap can cause skin irritation.
Swamp milkweed Asclepias incarnata
This plant is toxic to cats and dogs if ingested.
Sweet box Sarcococca confusa
The berries may cause mild stomach upset if ingested by pets.
Sweet Cherry Prunus avium
The leaves, stems and seeds (pits) contain cyanogenic glycosides which are toxic to cats and dogs if ingested.
Sweet Pea Lathyrus odoratus
This plant is toxic to cats and dogs if ingested, as it contains lathyrism causing compounds.
Sweet William Dianthus barbatus
This plant is considered mildly toxic to cats and dogs if ingested.
Swiss cheese plant Monstera deliciosa
This plant is toxic to cats and dogs if ingested, as it contains insoluble calcium oxalates.
Swiss Cheese Plant Monstera
This plant is toxic to cats and dogs if ingested.
Swiss Cheese Plant Monstera adansonii adansonii
This plant is toxic to cats and dogs if ingested.
Sword Lily Gladiolus
Gladiolus is toxic to cats and dogs if ingested.

T

Tamanu Calophyllum inophyllum
The seeds and oil are considered toxic if ingested by cats or dogs.
Tamarillo Solanum betaceum
The foliage and unripe fruit contain solanine, which can be toxic to cats and dogs if ingested.
Taro Colocasia esculenta
This plant is toxic to cats and dogs if ingested due to calcium oxalate crystals.
Tea Camellia sinensis
The leaves contain caffeine, which is toxic to cats and dogs if eaten in quantity and can cause restlessness, vomiting and a racing heart, so keep the plant...
Telegraph plant Codariocalyx motorius
There is no evidence suggesting this plant is toxic to cats or dogs.
Texas bluebonnet Lupinus texensis
This plant can be toxic to dogs and cats if ingested in large quantities.
Thaumatophyllum bipinnatifidum
This plant is toxic to cats and dogs if ingested.
Ti Plant Cordyline fruticosa
This plant is toxic to cats and dogs if ingested.
Tiger Lily Lilium lancifolium
This plant is toxic to cats and can cause kidney failure if ingested.
Titan arum Amorphophallus titanum
This plant is considered toxic to cats and dogs if ingested due to calcium oxalate crystals.
Tobacco Nicotiana tabacum
This plant is toxic to cats and dogs if ingested.
Tomato Solanum lycopersicum
The leaves and stems contain solanine, which can be harmful if ingested by cats or dogs.
Toyon Heteromeles arbutifolia
The leaves, seeds and unripe berries contain cyanogenic glycosides and can be toxic to pets if ingested in large quantities.
Trailing Lantana Lantana montevidensis
This plant is toxic to cats and dogs if ingested.
Traveller's-joy Clematis vitalba
This plant contains protoanemonin, which can cause irritation if ingested by cats or dogs.
Tree Cholla Cylindropuntia imbricata
This plant is not known to be chemically toxic to pets, but its sharp spines and barbed glochids can cause painful injuries to the mouth, paws and skin.
Tree of heaven Ailanthus altissima
This plant is considered toxic to cats and dogs if ingested.
Trumpet vine Campsis radicans
This plant can cause skin irritation in pets if they brush against the foliage.
Tuberous Begonia Begonia boliviensis
This plant is toxic to cats and dogs if ingested.
Tulip Tulipa
Tulips are toxic to cats and dogs if ingested, particularly the bulb.
Tulip Tulipa gesneriana
Tulips are toxic to cats and dogs if ingested, particularly the bulb portion.
Turkey berry Solanum torvum
This plant is considered toxic to pets if ingested due to solanine content.
Tutsan Hypericum androsaemum
This plant is considered toxic to cats and dogs if ingested.

U

Umbrella Tree Schefflera
This plant is toxic to cats and dogs if ingested, as it contains calcium oxalate crystals.

V

Velvet tree Miconia calvescens
There is no widely documented evidence of toxicity to cats or dogs, but it is best to keep pets from chewing on the foliage.
Vinca Catharanthus roseus
This plant is toxic to cats and dogs if ingested.
Viper's bugloss Echium vulgare
This plant can be mildly toxic to pets if ingested due to pyrrolizidine alkaloids.
Virginia creeper Parthenocissus quinquefolia
The plant contains calcium oxalate crystals which can cause irritation if ingested by cats or dogs.
Voodoo lily Sauromatum venosum
This plant is toxic to cats and dogs if ingested due to calcium oxalate crystals.

W

Water horsetail Equisetum fluviatile
This plant is considered toxic to horses and potentially other animals if ingested in large quantities.
Water lettuce Pistia stratiotes
This plant contains calcium oxalate crystals and is mildly toxic to cats and dogs. Chewing the leaves can cause mouth irritation, drooling and sometimes...
Wax Begonia Begonia cucullata
This plant is toxic to cats and dogs if ingested.
Wax Begonia Begonia semperflorens
This plant is toxic to cats and dogs if ingested, potentially causing irritation or vomiting.
Weeping Fig Ficus benjamina
This plant is toxic to cats and dogs if ingested.
Weeping Willow Salix babylonica
This plant contains salicin, which can cause gastrointestinal upset if ingested by cats or dogs.
Welsh onion Allium fistulosum
This plant is toxic to cats and dogs if ingested.
Welsh poppy Papaver cambricum
This plant is considered toxic to cats and dogs if ingested.
Western columbine Aquilegia formosa
This plant is considered mildly toxic to cats and dogs if ingested.
Western mugwort Artemisia ludoviciana
This plant is generally considered toxic to pets if ingested in large quantities.
White Snakeroot Ageratina altissima
This plant is toxic to cats and dogs if ingested.
White sweet clover Melilotus albus
This plant can be toxic to pets if ingested in large quantities due to coumarin content.
White Trillium Trillium grandiflorum
This plant contains saponins and may cause vomiting or mild digestive upset in cats and dogs if eaten.
Wild Angelica Angelica sylvestris
This plant can cause skin irritation or digestive upset if ingested by cats or dogs.
Wild Carrot Daucus carota subsp. carota
This plant can cause skin irritation in some pets due to furanocoumarins in the leaves.
Wild Jack Artocarpus hirsutus
The milky sap can cause irritation if ingested or touched by pets.
Wild mustard Sinapis arvensis
This plant can be toxic to pets if ingested in large quantities due to glucosinolates.
Wild potato Solanum etuberosum
This plant contains solanine and is toxic to cats and dogs if ingested.
Willow Salix
Willows contain salicin which can be toxic to cats and dogs if ingested.
Winter Aconite Eranthis hyemalis
This plant is toxic to cats and dogs if ingested.
Winter Daphne Daphne odora
This plant is toxic to cats and dogs if ingested, as all parts contain daphnetoxin.
Winter Honeysuckle Lonicera fragrantissima
The berries may cause mild stomach upset if ingested by cats or dogs.
Winterberry Ilex verticillata
The berries can be toxic to cats and dogs if ingested in large quantities.
Wintergreen Gaultheria procumbens
This plant is considered toxic to cats and dogs if ingested due to the presence of methyl salicylate.
Wintersweet Chimonanthus praecox
The seeds contain calycanthine, a toxic alkaloid, and can poison cats and dogs if chewed or swallowed. Keep pets away from the seed pods.
wood anemone Anemone quinquefolia
This plant is considered toxic to cats and dogs if ingested.
Wood anemone Anemone nemorosa
This plant is considered toxic to cats and dogs if ingested.
Wood sorrel Oxalis
This plant is toxic to cats and dogs if ingested due to soluble calcium oxalates.
Wood sorrel Oxalis acetosella
This plant contains soluble calcium oxalates which can be toxic to cats and dogs if ingested in large quantities.

X

Xanadu Philodendron Thaumatophyllum xanadu
This plant is toxic to cats and dogs if ingested.

Y

Yarrow Achillea millefolium
This plant is toxic to cats and dogs if ingested.
Yaupon holly Ilex vomitoria
The berries are considered toxic to cats and dogs if ingested.
Yellow flag iris Iris pseudacorus
This plant is toxic to cats and dogs if ingested.
Yew pine Podocarpus macrophyllus
This plant is considered toxic to cats and dogs if ingested.
Yucca
Yucca is toxic to cats and dogs if ingested, as it contains saponins that can cause irritation.

Z

Zebra plant Alocasia zebrina
This plant is toxic to cats and dogs if ingested.
ZZ Plant Zamioculcas zamiifolia
This plant is toxic to cats and dogs if ingested.

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These lists are built from AI-generated care guides checked against GBIF taxonomy. They are general information, not horticultural or veterinary advice. Read about how we build these guides.