Ciliate willowherb
Epilobium ciliatum · Onagraceae
The gardener's calendar
Ideal time to plant ciliate willowherb: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- June to September
- Adult size
- 0.5 to 1.2 m tall
- Growth
- Fast
- Hardiness
- Very hardy (down to -20°C)
- Origin
- North America
- Soil type
- Fresh to moist, well-drained soil
Care
Watering
The ciliate willowherb appreciates fresh, moist soil: water regularly during the growing period to maintain consistent moisture without waterlogging. During dry spells, increase frequency, especially in summer. Once established, the plant tolerates humidity variations better.
Sunlight
Position it in full sun or partial shade for better flowering. It tolerates partial shade well but will flower less abundantly. A sunny exposure stimulates growth and flower production.
Soil and substrate
Prefer rich, well-drained soil that stays fresh, slightly acidic to neutral. The ciliate willowherb adapts to poor or moist soils (ditches, riparian zones). Enrich with compost when planting to promote root establishment.
Pruning and maintenance
Prune the stems after flowering to encourage denser branching and prevent a sparse appearance. Remove spent flowers to encourage new flower formation. In late winter, cut dead stems to ground level.
Fertilizer
Not very demanding nutritionally; a balanced fertilizer application in spring is usually sufficient. In very poor soil, add well-decomposed compost. Avoid excess nitrogen, which promotes foliage at the expense of flowers.
Diseases and pests
The ciliate willowherb is generally very resistant to diseases and pests. Excess stagnant moisture can occasionally encourage fungal issues: ensure good drainage. Watch for powdery mildew in warm, humid conditions.
Did you know?
The ciliate willowherb is a pioneering colonizer: it establishes quickly on disturbed or degraded terrain, giving it a major ecological role in natural restoration of areas. Its tiny seeds, topped with silky hairs, disperse easily on the wind, allowing the plant to travel long distances and repopulate bare spaces.
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.