Hoary willowherb (Epilobium parviflorum)

Hoary willowherb

Also known as: Hairy willowherb

Hoary willowherb (Epilobium parviflorum) is a perennial herb found in many places across North America Europe western Asia and northern Africa. It grows in marshes swamps and moist mountain meadows and blooms between spring and fall. Hoary willowherb establishes a deep taproot but also sends exploratory roots far and wide to help it spread.

Scientific classification

Species

Hoary willowherb (Epilobium parviflorum)

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Perennial

Lifespan

Herb

Plant Type

6 mm to 7 mm

Flower Size

Pink, Purple, Red

Flower Color

Deciduous

Leaf type

5 - 25 ℃

Ideal Temperature

Images of Hoary willowherb

Distribution of Hoary willowherb

Distribution Map

Hoary willowherb is native to a vast range of temperate regions across Eurasia and North Africa, flourishing in a variety of habitats from the Mediterranean to the borders of the Arctic. It has been introduced to other temperate areas, establishing itself in parts of North America and New Zealand. The precise nuances of its spread reflect adaptations to diverse climates and resilience in different ecosystems.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Stream banks, Marshes, Fens

Care Guide for Hoary willowherb

Every week

Water

Full sun

Sunlight

5 - 25 ℃

Ideal Temperature

Water: Hoary willowherb thrives in moist environments and is tolerant of short dry periods. It prefers well-hydrated soil and requires weekly watering to maintain moisture. This herbaceous perennial's growth and flowering potential are directly influenced by water availability.

Fertilize: For optimal care of hoary willowherb, use a balanced fertilizer quarterly during growth seasons, adjusting amounts for dormancy. Seasonal needs vary—higher in spring/summer, lower in fall/winter. Slow-release formulas are beneficial, and prevent root burn by watering before and after fertilization.

Pruning: Hoary willowherb is a perennial herb with pale flowers. Prune in early to late spring to promote new growth; trim dead stems and thin dense areas for better air circulation. Use clean, sharp tools and cut back by one-third for a compact shape.

Propagation: Hoary willowherb propagates well through sowing fresh seeds in a well-draining substrate, keeping it moist but not waterlogged. Lightly press seeds into the surface for germination, requiring bright, indirect sunlight. Transplant strong seedlings after hardening them off to outdoor conditions.

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Images of Hoary willowherb

Distribution of Hoary willowherb

Care Guide for Hoary willowherb

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