Small-flowered willowherb
Epilobium parviflorum · Onagraceae
The gardener's calendar
Ideal time to plant small-flowered willowherb: 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
- Adult size
- 30 to 80 cm in height
- Growth
- Fast
- Hardiness
- Very hardy (down to -15°C)
- Origin
- Temperate and western Europe
- Soil type
- Moist to fresh soils, tolerates humidity
Care
Regular watering
The small-flowered willowherb appreciates constantly moist soil but not waterlogged. Water regularly during the growing season (spring-summer), especially during prolonged dry spells. In autumn and winter, reduce watering based on natural rainfall.
Sunny to part shade exposure
Install this plant in full sun or part shade to optimize its flowering. It tolerates partially shaded areas well but flowers more generously in good light conditions. It adapts well to varied conditions.
Fresh and well-drained soil
Choose a substrate rich in organic matter, moist but drained to avoid root asphyxia. The small-flowered willowherb thrives particularly at the edge of natural wet areas or in damp garden sites. Adding compost at planting improves soil structure.
Pruning and maintenance
Prune the plant in late autumn or early spring before growth resumes. Remove dead stems and deadhead spent flowers to extend flowering. This encourages more compact growth and better branching.
Moderate nutritional input
Balanced fertilizer applied in spring is generally sufficient. In naturally rich soil or regularly amended soil, no additional feeding is needed. Avoid excess nitrogen, which would promote foliage at the expense of flowers.
Good overall health
The small-flowered willowherb is robust and rarely affected by common garden diseases. Monitor excessive moisture to prevent root rot in poorly drained areas. Good air circulation limits fungal issues.
Did you know?
The small-flowered willowherb has long been used in traditional European medicine for its purported soothing properties. Its tiny pink-mauve flowers attract bees and butterflies, making it a valuable plant for pollinator gardens. In natural habitats, it rapidly colonizes disturbed wet areas and plays an important role as a pioneer species in ecological regeneration.
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.