Feverfew (Tanacetum parthenium)

Feverfew

Tanacetum parthenium

Daisy-like blooms carry medicinal legacy, a cheerful garden staple. Herbaceous flowering perennial; common name: Feverfew.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerate short periods of direct sunlight, but shield from intense midday sun in hot climates
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Watering Water deeply when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Thrives in 15–22℃; tolerates light frost down to 5℃, avoid extreme heat above 28℃
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Characteristics

  • Leaf: Aromatic, feathery, bright green leaflets with finely toothed edges; arranged alternately on stems
  • Flower: Daisy-like composite heads with white ray florets surrounding yellow disc florets, clustered in flat-topped corymbs
  • Stem: Erect, branching, slightly hairy, ranging from green to reddish-brown
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Diluted balanced fertilizer every 2 weeks. Avoid over-fertilizing to prevent leggy, weak growth

Composted eggshell powder:Mix 1 tablespoon of fully dried, ground eggshell powder into the top 2 cm of soil monthly to boost soil structure and calcium levels
Pruning
  • Deadhead spent blooms regularly to encourage continuous flowering throughout the summer
  • Cut back stems to 10 cm above soil level after flowering to promote bushier growth the following season
  • Remove yellowing or diseased foliage to improve airflow and reduce pest and disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; contains parthenolide and pyrethrins, causing gastrointestinal distress and lethargy

Humans: Mild oral irritation if ingested; may trigger allergic dermatitis in sensitive individuals

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Garden Uses & Culture

Culture: Historically used for migraine relief and fever reduction; symbolizes protection in European folk traditions

Usage: Ornamental garden plant; medicinal herb (consult a healthcare provider before human consumption)