Hairy teasel
Dipsacus pilosus · Caprifoliaceae
A striking biennial or short-lived perennial with rigid, spiny flower heads that bloom from summer through early autumn. The fuzzy, lance-shaped foliage forms an upright rosette in its first year, then sends up tall, branching stems topped with distinctive purple or lavender thistle-like flowers. Hardy, drought-tolerant once established, and invaluable for pollinators and dried flower arrangements.
The gardener's calendar
Ideal time to plant hairy teasel: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- July to September
- Mature size
- 32 to 60 inches tall
- Growth rate
- Fast
- Hardiness
- Very hardy (down to 5°F / -15°C)
- Origin
- Western and central Europe
- Soil type
- Well-draining, chalky or neutral
Care
Watering
Water regularly during the first year after planting to encourage root establishment. Once established, the fuzzy teasel tolerates drought well thanks to its deep root system. Reduce watering during periods of abundant natural rainfall.
Light
Plant it in full sun for optimal flowering and sturdy growth. It can tolerate light dappled shade, but vigour will be reduced. Choose an airy, sunny spot receiving at least six hours of direct light daily.
Pruning and cutting
Cut stems back to ground level in late autumn or early spring. You can harvest flowers before full maturity to encourage bushier branching. Leave a few dried flower heads through winter for insects and garden interest.
Soil and planting
Choose well-draining, chalky or neutral soil. The fuzzy teasel adapts to poor soils and dislikes waterlogging. Enrich the soil with compost at planting time on very depleted ground, but avoid over-feeding.
Feeding
A hardy, undemanding plant: balanced fertiliser applied in spring is more than enough. Optional well-rotted compost spread over the surface aids establishment. Avoid excess nitrogen, which promotes leafy growth at the expense of flowers.
Diseases and pests
The fuzzy teasel is generally very resistant to disease and pests. Watch for aphids in spring, though no urgent chemical intervention is needed if numbers remain light. Poor drainage can lead to root rot: improve soil aeration if necessary.
Did you know?
The fuzzy teasel was once cultivated on a large scale for its stiff flower heads, used in carding — the combing of textile fibres. These naturally spiny seed heads lined the cylinders of looms before metal cards arrived, which is why its English name is 'Fuller's teasel' (from the fulling trade). Medieval French weavers' villages relied on it extensively.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.