Hornemann's Willowherb
Epilobium hornemannii
Last reviewed: June 2026
Light
part shade
Water
medium
Size
8"–24" H × 4"–12" W
Bloom
Jun, Jul, Aug
Native to
AZ, CA, CO, ID and 11 more states
Pollinators
bees, butterflies
Browse plants for this ecoregion
Hornemann's willowherb is a modest perennial that forms compact clumps with narrow leaves and small pink to purple flowers. This native wildflower blooms through summer months and thrives in partially shaded locations with moderate moisture.
In an HOA neighborhood
Hornemann's Willowherb takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Appears weedy and unstructured
- May be confused with invasive willowherbs
- Unknown dormancy appearance creates uncertainty
Wildlife value
The summer flowers provide nectar for native bees and butterflies. As a member of the evening primrose family, it supports various native pollinators during its extended bloom period.
Common questions
- How much sun does Hornemann's Willowherb need?
- Hornemann's Willowherb grows best in part shade conditions.
- When does Hornemann's Willowherb bloom?
- Hornemann's Willowherb blooms in June, July, and August.
- Where is Hornemann's Willowherb native?
- Hornemann's Willowherb (Epilobium hornemannii) is native to AZ, CA, CO, ID and 11 more states, per the USDA PLANTS Database and regional native plant society lists.
- What pollinators does Hornemann's Willowherb attract?
- Hornemann's Willowherb draws bees and butterflies.
- Is Hornemann's Willowherb HOA-friendly?
- Hornemann's Willowherb takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Hornemann's Willowherb? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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