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Plant guide

Heartleaf Hoya.

Hoya kerrii

Pronounced HOY-uh KAIR-ee-eye

Also known as Heart Hoya

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Heart Hoya
Photo by luluchouette (CC BY) via iNaturalist

The Heartleaf Hoya is a charming succulent vine known for its distinctive heart shaped leaves. It is a slow growing epiphyte that thrives in warm, bright conditions. This plant is a favorite for its unique look and ease of care.

Another photo of Heartleaf Hoya
Photo by 胡正恆(Jackson Hu) (CC BY) via iNaturalist

At a glance

Care level
Easy
Plant type
Succulent vine
Light
Bright, indirect light
Indoor light
Bright indirect
Water
Every 14 to 21 days
Mature size
Up to 4 meters long
Growth rate
Slow
Hardiness
USDA 10 to 12
Bloom time
Summer

Care

Allow the soil to dry out completely between waterings to prevent root rot. Provide plenty of bright, indirect light to encourage healthy growth. Watch for shriveling leaves, which often indicate the plant needs a drink.

Watering
Water thoroughly only when the soil has dried out entirely.
Feeding
Use a balanced liquid fertilizer diluted to half strength during the growing season.
Pruning
Prune only to remove dead stems or maintain shape after flowering.
Repotting
Repot only when the plant becomes root bound, as they prefer a snug pot.
Soil
Well draining succulent or orchid mix
Soil pH
6.0 to 7.5
Temperature
15 to 28°C
Humidity
40 to 60%
Drought tolerance
High
Lifespan
Perennial, typically 10 to 20 years with proper care.
Fragrance
Light
Deer and rabbits
Moderate

Signs it needs repotting

  • Roots growing out of the drainage holes.
  • Water running straight through the pot without soaking in.
  • The plant has stopped growing during the active season.

Safety

People
The plant contains milky latex sap that can cause mild skin irritation upon contact.
Pets
This plant is generally considered non toxic to cats and dogs.
Children
Keep out of reach of children as the leaves are firm and could pose a choking hazard if broken into pieces.
Contact allergens
The milky sap may cause skin irritation for sensitive individuals.
Airborne allergens
There are no known significant respiratory allergens associated with this plant.
Edibility
This plant is not considered edible and ingestion may cause gastrointestinal distress.

How to identify it

  • Thick, succulent heart shaped leaves
  • Vining growth habit
  • Waxy leaf texture
  • Small clusters of star shaped flowers
Height
1 to 4m
Spread
0.3 to 0.6m
Leaves
dark green, evergreen
Flowers
white, pinkish, yellow, 1 to 2cm

Problems to watch for

    Check your heartleaf hoya from a photo

    Pocket Botanist looks at a photo of your plant and tells you what's wrong and what to try first.

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    Growing it

    Propagation
    cuttings
    When to plant
    spring, summer
    Overwintering
    Move the plant indoors if temperatures drop below 15 degrees Celsius. Reduce watering significantly during the winter months as growth slows down.
    In containers
    It thrives in containers and prefers a snug pot to encourage blooming, with a minimum size of 10 cm.

    Stem Cuttings

    1. 1. Select a healthy stem with at least one node.
    2. 2. Cut just below the node using clean shears.
    3. 3. Place the cutting in a well draining potting mix or water.
    4. 4. Keep in bright, indirect light until roots form.

    Group plants with similar water needs together to avoid overwatering your Hoya.

    Grows well with

    • Orchid · They share similar requirements for bright, indirect light and well draining media.
    • Pothos · Both plants enjoy similar humidity levels and look great in hanging displays.

    Similar species

    • Wax Plant · It is a more common, faster growing relative with similar care needs.
    • Hindu Rope Plant · It shares the same genus and vining habit but features twisted, curled foliage.

    Science

    Family
    Apocynaceae
    Genus
    Hoya
    Order
    Gentianales
    Class
    Magnoliopsida
    Native range
    Southeast Asia, including Thailand and Vietnam.
    Conservation
    This species is not currently listed as endangered or threatened in its native range.

    It grows as an epiphyte in tropical forests, clinging to trees for support while gathering moisture from the air.

    Value to wildlife
    nectar source
    Pollinators
    bees, moths
    Uses
    houseplant, gift plant, hanging basket

    Through the year

    JFMAMJJASOND
    Flowering
    Fruiting
    Foliage

    Ecological indicators

    Salinity
    1/9
    Soil reaction
    6/9
    Light
    7/9
    Temperature
    8/9
    Moisture
    3/9
    Nutrients
    3/9

    Taxonomy resolved against GBIF.

    Questions people ask

    Will my single leaf cutting grow into a vine?
    It is very rare for a single leaf cutting to develop a node and grow into a vining plant.
    How often should I water it?
    Water only when the soil has dried out completely, as it prefers to be on the drier side.

    Where the name comes from

    The genus honors Thomas Hoy, a gardener to the Duke of Northumberland, while the species name kerrii honors the botanist Arthur Francis George Kerr.

    Good to know

    • It is commonly known as the Sweetheart Plant due to its distinct heart shaped leaves.
    • The plant is a slow grower and can take years to produce its first bloom.
    • It is a succulent vine that stores water in its thick leaves to survive dry spells.
    • The flowers produce a sweet, subtle fragrance, especially in the evening.

    Also in

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    This guide was generated with AI on and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.