Tanacetum parthenium (Feverfew)
Tanacetum parthenium (Feverfew)
Contents
Introduction & History
Feverfew is the migraine herb — a cheerful, daisy-flowered perennial that has been used for headaches since ancient Greece and now has clinical evidence supporting its effectiveness for migraine prevention. Its bright, button-like flowers and aromatic, chrysanthemum-scented foliage make it a charming cottage garden plant, while its bitter leaves contain parthenolide, the compound that has put it on the radar of modern neurology.
History & Origin
Native to southeastern Europe, now naturalised across Europe, North America, and temperate regions worldwide. The name 'feverfew' derives from the Latin 'febrifugia' (fever reducer). Used since ancient Greece for headaches, fever, and inflammation. The British herbalist John Gerard (1597) recommended it for migraine. Modern clinical interest was sparked in the 1970s when a Welsh doctor's wife cured her migraines by chewing the leaves daily.
Botanical Description
Bushy herbaceous perennial growing 30–60 cm tall. Leaves are bright yellow-green, pinnately divided, resembling small chrysanthemum leaves, and strongly aromatic when crushed — a sharp, bitter, chrysanthemum-like scent. Clusters of small, daisy-like flowers (1–2 cm across) with white rays and prominent yellow button centres bloom throughout summer. The overall habit is bushy and branching. Self-sows freely.
Stem: Semi-woody to woody at base • Height: 50 cm at maturity • Spread: 30 cm • Foliage: yellow-green • Flowers: white-yellow center (summer)
Planting & Cultivation
Sow seed in spring on the surface (needs light, germinates in 10–14 days). Or plant nursery specimens, spacing 25–30 cm apart. Full sun to partial shade, any well-drained soil. Self-sows readily — sometimes too much. The golden-leaved cultivar 'Aureum' is popular as a bright edging plant. Position where the cheerful flowers and aromatic foliage can be enjoyed.
| Sun exposure | Full Sun Partial Shade |
| Soil pH | 6.0-7.0 |
| Spacing | 30 cm |
| Seed depth | 3–6 mm (surface-sow if light-dependent germinator) |
| Water needs | Moderate |
| Soil type | Well-drained, humus-rich loam; add perlite or grit for drainage |
Cultivation Details
Easy and adaptable — full sun to partial shade, any reasonable soil. Pinch tips for bushier growth. Deadhead to prevent excessive self-seeding. The plant is short-lived (2–3 years) but perpetuates through self-seeding. Cut back hard after the main flowering for a possible second flush. Feed lightly if at all. Treat as a cottage garden plant that looks after itself.
Climate & Hardiness
Hardy to about −25°C (USDA zones 4–9). Short-lived perennial that self-sows for continuity. Tolerates cold winters and warm summers. Handles drought once established. Evergreen or semi-evergreen in mild climates.
USDA zones: 5-9
Minimum temperature: -20°C
Drought tolerance: Yes — established plants tolerate dry spells
Seasonal Care
Spring: fresh growth (self-sown seedlings appear). Summer: continuous flowering — harvest for medicinal use. Autumn: cut back; allow some self-seeding. Winter: semi-evergreen in mild zones, dormant in cold.
Propagation
By seed — very easy, germinates in 10–14 days with light. Self-sows prolifically. Division in spring. Stem cuttings in early summer. The plant propagates itself so effectively that management is about controlling numbers rather than encouraging growth.
| Method | Success rate | Time | Notes |
|---|---|---|---|
| Stem cuttings | 70–90% | 2—4 weeks | Softwood in spring, semi-ripe in summer; 8–12 cm |
| Division | 95%+ | Immediate | Split established clumps in spring or autumn |
| Seed | 50–80% | 14–28 days | Some require cold stratification; germination variable |
| Layering | 80–90% | 6–12 weeks | Pin low branch to soil; sever when rooted |
🌍 Distribution Map
Native origin: Southeastern Europe
Diseases & Pests
Aphids on young growth. Generally healthy and pest-free. The strong aromatic compounds deter many insects. No significant disease problems. The chrysanthemum-like scent suggests (and reality confirms) some pest-deterrent properties.
Culinary Uses
Not a culinary herb — the leaves are extremely bitter and unpleasant-tasting. The traditional migraine-prevention method of chewing 2–3 fresh leaves daily is an exercise in determination. Some people sandwich the leaf in bread to mask the bitterness. The bitter compounds are the medicine — there's no way to make it palatable while retaining efficacy.
Medicinal & Aromatherapy
Contains parthenolide, which inhibits prostaglandin and serotonin release — mechanisms relevant to migraine pathophysiology. Clinical trials show that regular daily use (dried leaf or freeze-dried capsules) reduces migraine frequency and severity in many sufferers. Also traditionally used for fever, arthritis, and menstrual pain. Must be taken preventively (daily for weeks) rather than as an acute migraine treatment.
Container & Companion Growing
Container Growing
Excellent in containers — the bushy, compact habit suits pots and window boxes well. Standard potting mix, 15–20 cm pots. Full sun. Water moderately. The continuous summer flowering is rewarding. The golden cultivar is particularly attractive in containers.
• Minimum pot size: 25–35 cm Ø, 10 L+
• Depth depends on root type
• Use free-draining potting compost with 20–30% perlite or grit
• Ensure drainage holes; stand on pot feet to prevent waterlogging
• Feed with dilute liquid fertiliser (half-strength) every 2–3 weeks in growing season
Companion Planting
Traditional cottage garden companion for roses — the aromatic foliage may deter some pests. Plant near vegetables where the daisy flowers attract hover flies and other beneficial insects. The golden-leaved 'Aureum' form makes a striking edging plant. Good in knot gardens and formal herb designs.
| ✓ Good companions | Most vegetables, Fruit trees |
| ✗ Avoid planting with | Other vigorous herbs |
Common Mistakes to Avoid
Expecting it to cure migraines immediately (it's a preventive, not an acute treatment — takes weeks of daily use). Stopping suddenly (can cause rebound headaches). Not chewing leaves regularly enough for the traditional method. Allowing unlimited self-seeding. Mouth ulcers can occur from chewing raw leaves — capsules or sandwiching in bread avoids this.
Harvesting & Preservation
For migraine prevention, harvest fresh leaves and eat 2–3 daily (the traditional method). For drying, harvest leaves and flowering tops in summer. Dry quickly in a warm, dark spot. The parthenolide content is highest in the leaves and flower heads. Freeze-dried leaves retain more active compounds than conventionally dried. Commercial preparations are available as standardised capsules.
• Time of day: Early morning, after dew has evaporated but before intense midday heat volatilises essential oils
• Growth stage: Just before flowering, when essential oil concentration peaks. Once flowers open, the plant redirects energy from leaf production
• Season: Summer
• Part harvested: Leaves, Flowers
• Harvest rule: Never remove more than ⅓ of the plant at once; this ensures continued vigorous regrowth
• Technique: Cut stems cleanly above a leaf node with sharp scissors or secateurs. Tearing damages tissue and invites disease
| Method | Process | Shelf life | Best for |
|---|---|---|---|
| Air drying | Tie bundles, hang upside down in warm, dark, airy space | 6–12 months | Most herbs |
| Oven / dehydrator | Spread on trays, 35–45°C until crisp | 6–12 months | Fleshy-leaved herbs |
| Freezing (whole) | Blanch 5s, ice bath, pat dry, freeze flat on tray | 6 months | Basil, chives, parsley |
| Freezing (oil cubes) | Chop fine, pack into ice cube tray, cover with olive oil | 6 months | Any culinary herb |
| Herb salt | Layer herb and coarse salt 1:4, dry and grind | 12+ months | Rosemary, thyme, sage |
| Infused vinegar | Pack jar, cover with warm vinegar, steep 2–4 weeks | 6 months | Tarragon, dill, basil |
| Infused oil | Fill jar with dried herb, cover with oil, steep 4–6 weeks | 3–6 months | Rosemary, thyme, chilli |
Frequently Asked Questions
Does it prevent migraines?
Clinical evidence supports regular daily use for reducing migraine frequency and severity. It's a preventive, not an acute treatment — you must take it every day for several weeks before effects are noticed. Not effective for all migraine sufferers but beneficial for a significant proportion.
How do I take it for migraines?
Traditionally: chew 2–3 fresh leaves daily (sandwich in bread to avoid mouth ulcers from the bitter compounds). More practically: take standardised freeze-dried capsules (minimum 250 μg parthenolide) daily. Don't stop suddenly — taper off to avoid rebound headaches.
Is the golden-leaved form as medicinal?
Probably less so — the gold foliage may indicate lower chlorophyll and potentially lower parthenolide content. For medicinal use, grow the green-leaved species form. The golden 'Aureum' is primarily ornamental.
Seasonal Care Calendar
🌱 Spring (Mar–May)
Water: Moderate
Feeding: Light feeding
☀️ Summer (Jun–Aug)
Water: Moderate
Feeding: No feeding
🍂 Autumn (Sep–Nov)
Water: Light
Feeding: No feeding
❄️ Winter (Dec–Feb)
Water: Light
Feeding: No feeding
The migraine herb — clinical evidence supports daily use for reducing migraine frequency. Cheerful daisy-flowered cottage garden perennial (30–60 cm). Hardy to −25°C (zones 4–9). Self-sows freely. Extremely bitter leaves — take as capsules or sandwich in bread. Preventive, not acute treatment.
Quick Reference: Tanacetum parthenium
Key Principles: Right location, well-drained soil, regular harvesting to promote growth, and appropriate winter protection for tender species.