How to Grow Tansy

Tansy

Tanacetum vulgare

herb

Tansy is a perennial herb with feathery, fern-like foliage and bright yellow button-like flower clusters. It has been used for centuries in traditional medicine, gardening, and household applications, though it contains toxic compounds and should be handled carefully.

Growing Conditions

☀️

Sun: Full sun to partial shade, 6+ hours of direct sunlight daily

💧

Water: Drought tolerant once established; water moderately during growing season, reduce in winter. Tolerates dry conditions well.

📏

Spacing: 24 inches

📅

Days to maturity: 60-90 days to first flowering from seed

🌱

Planting depth: Surface sow or press lightly into soil; needs light to germinate

Soil

Type: Well-draining loamy or sandy soil

pH: 5.5-7.0

Amendments:

Compost Peat moss Perlite for drainage

Growing Zones

Find your zone →

Thrives in zones 2-9, extremely cold and drought hardy

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a

Growth Stages

Seedling

2-3 weeks

Tiny seedlings with simple leaves emerge. Very small and delicate initially.

Keep soil lightly moist, provide bright light, thin seedlings to proper spacing when 2-3 inches tall.

Vegetative

6-8 weeks

Plant develops fern-like, feathery foliage that is aromatic when crushed. Mounding habit becoming visible.

Pinch back growing tips to encourage bushier growth. Minimal watering needed as drought tolerance increases. Can divide mature plants in spring.

Flowering

6-10 weeks

Tall stems emerge topped with tight clusters of small, button-like yellow flowers arranged in flat-topped sprays.

Deadhead spent flowers to encourage continued blooming or allow flowers to remain for drying. Plant reaches full height (2-3 feet).

Seed Production

4-6 weeks

Flowers fade and develop into small seeds within dried flower heads. Foliage may begin to decline toward season's end.

Leave flowers on plant if self-seeding is desired; otherwise deadhead to prevent prolific reseeding. Allow stems to dry naturally.

Winter Dormancy

8-12 weeks

Foliage dies back in cold climates; perennial root system persists underground. Plant becomes dormant.

Cut back dead stems in late fall or early spring. In mild zones, foliage may persist. No watering needed.

Companion Planting

Plan your garden →

Plant with:

Yarrow Chamomile Thyme Oregano Sage Lavender Fennel

Avoid planting near:

Most vegetables (can inhibit growth) Beans Peas Cabbage family plants Fruit trees

Common Pests

Hand-pick beetles and egg clusters; use neem oil if infestation is severe; encourage natural predators.
Spray with strong water stream; use insecticidal soap or neem oil; attract ladybugs and lacewings.
Increase humidity; spray with water; use miticide if necessary; ensure adequate air circulation.
Hand-pick or use Bacillus thuringiensis (Bt); plant attracts some caterpillar species naturally.

Uses

🏠

Natural insect repellent

Household

Tansy has been traditionally used to repel insects from homes, gardens, and stored goods. Its strong scent naturally deters flies, mosquitoes, and moths. [source]

💊

Traditional herbal remedy

Medicinal

Historically used in folk medicine for digestive and anti-parasitic purposes. Modern herbalists note its potential benefits, though internal use requires professional guidance due to toxin content. [source]

🎨

Dried flower arrangements and dyes

Craft

The bright yellow button flowers dry beautifully and hold color for months, making them ideal for dried arrangements, wreaths, and potpourri. Foliage can be used in natural dyes. [source]

🏠

Companion planting for pest control

Household

Tansy is used as a natural garden pest deterrent when planted near vegetables and fruit trees, particularly to repel Japanese beetles and other harmful insects. [source]

🍳

Culinary flavoring (historical)

Culinary

Tansy was traditionally used to flavor tansy cakes and other dishes in medieval and early modern England, providing a bitter, citrusy note. Modern culinary use is limited due to toxicity concerns. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest leaves and stems anytime during growing season for fresh use; for drying, cut stems just as flowers open in mid-summer for best potency. Dry flower clusters completely and store in airtight containers. Wear gloves when handling as foliage can cause dermatitis in sensitive individuals.

Fun Facts

🌱 Tansy was used in medieval times as a 'strewing herb' to freshen indoor spaces and repel insects; it was scattered on floors because its crushed leaves emit a powerful aromatic scent.
🌱 The plant contains thujone, a volatile oil also found in absinthe, which gives it both its insect-repelling properties and its toxicity—care must be taken to avoid internal consumption.
🌱 Tansy is so hardy and persistent that it has naturalized across North America, Europe, and Asia; in some regions it is considered invasive due to its vigorous spreading via seeds and underground rhizomes.

Want personalized planting timelines?

Get started free