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Plant guide

Feverfew.

Tanacetum parthenium

Pronounced tan-uh-SEE-tum par-THEN-ee-um

Also known as Feverfew

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feverfew
Photo by zebedeugalinha (CC BY) via iNaturalist

Feverfew is a charming, daisy-like perennial that has been used in gardens for centuries. It produces masses of small, white flowers with yellow centers that look lovely in borders. You will find it is quite hardy and often reseeds itself freely.

Another photo of Feverfew
Photo by zebedeugalinha (CC BY) via iNaturalist

At a glance

Care level
Easy
Plant type
Perennial herb
Light
Full sun to partial shade
Indoor light
Bright indirect
Water
Every 3 to 7 days
Mature size
2 to 3 feet
Growth rate
Medium
Hardiness
USDA 4 to 9
Bloom time
Mid summer to early autumn

Care

Plant this in well-draining soil and keep it consistently moist but not soggy. Watch for aphids on the flower buds and deadhead spent blooms to encourage a second flush of flowers. It thrives best when it gets plenty of light but appreciates some shade during the hottest part of the day.

Watering
Water when the top inch of soil feels dry to the touch.
Feeding
Apply a balanced liquid fertilizer during the active growing season.
Pruning
Trim back spent flowers to promote bushier growth and prevent unwanted self-seeding.
Repotting
Repot if the plant becomes root-bound or needs fresh soil to maintain vigor.
Soil
Well-draining, fertile soil
Soil pH
6.0 to 7.5
Temperature
-20 to 35°C
Humidity
40 to 70%
Drought tolerance
Moderate
Lifespan
Short lived perennial, typically 2 to 3 years.
Fragrance
Light
Deer and rabbits
High

Signs it needs repotting

  • Roots growing out of the drainage holes.
  • Water running straight through the pot without soaking in.

Safety

People
The plant is generally safe but the fresh leaves can cause contact dermatitis or mouth irritation in sensitive individuals.
Pets
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 problems.
Children
Keep away from young children as the leaves can cause mouth irritation if ingested.
Contact allergens
The foliage can cause skin irritation or dermatitis in people sensitive to sesquiterpene lactones.
Airborne allergens
Pollen may cause allergic reactions in individuals sensitive to the Asteraceae family.
Edibility
Feverfew leaves can cause mouth ulcers or irritation if chewed raw.

How to identify it

  • Daisy-like white flower heads
  • Strongly aromatic fern-like leaves
  • Clump forming growth habit
  • Yellow central disc florets
Height
0.3 to 0.9m
Spread
0.3 to 0.6m
Leaves
bright green, yellow green, deciduous
Flowers
white, yellow, 1 to 2cm

Problems to watch for

  • Aphids · Small insects that cluster on new growth and flower buds.
  • Powdery mildew · A fungal infection that creates a white dusty coating on leaves.

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Growing it

Propagation
seed, cuttings, division
When to plant
spring, autumn
Overwintering
Cut back the foliage to the ground after the first hard frost. Apply a light layer of mulch if you live in a very cold climate to protect the crown.
In containers
It grows well in containers at least 25 cm deep with good drainage.

Seed

  1. 1. Sow seeds on the surface of moist soil in spring.
  2. 2. Press them down gently without covering.
  3. 3. Keep the soil consistently moist until germination.

Plant feverfew near roses to help deter aphids and other unwanted visitors.

Grows well with

  • Lavender · They share similar sun and drainage requirements.
  • Sage · Both plants enjoy well drained soil and sunny conditions.

Similar species

  • Chamomile · It has similar daisy like flowers but is used primarily for tea.

Science

Family
Asteraceae
Genus
Tanacetum
Order
Asterales
Class
Magnoliopsida
Native range
Balkan Peninsula, Anatolia, and the Caucasus.
Conservation
Not of conservation concern.

This plant thrives in disturbed soils and sunny meadows where it competes well with other herbaceous species.

Value to wildlife
nectar source, attracts beneficial insects
Pollinators
bees, butterflies, beetles
Uses
medicinal herb, pollinator garden, border plant, cut flowers

Through the year

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Flowering
Fruiting
Foliage

Ecological indicators

Salinity
2/9
Soil reaction
6/9
Light
7/9
Temperature
5/9
Moisture
5/9
Nutrients
5/9

Taxonomy resolved against GBIF.

Questions people ask

Is feverfew a perennial?
It is a short lived perennial that often acts like an annual or biennial.
Does it need full sun?
It thrives best in full sun but will tolerate partial shade.

Where the name comes from

The name Tanacetum is thought to derive from the Greek word athanatos, meaning immortal, while parthenium refers to its historical use as a medicinal herb.

Good to know

  • Feverfew is a member of the daisy family.
  • The name comes from the Latin word febrifugia, meaning fever reducer.
  • It often self seeds readily in the garden.
  • The flowers look like miniature daisies.

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.