American Willowherb
Epilobium ciliatum
Last reviewed: June 2026
Light
part shade
Water
medium
Size
12"–48" H × 6"–24" W
Bloom
Jun, Jul, Aug, Sep
Native to
AZ, CA, CO, CT and 38 more states
Pollinators
bees, butterflies
Browse plants for this ecoregion
American willowherb is a native perennial with narrow leaves and small pink to purple flowers that bloom from summer into fall. It forms loose colonies through underground runners and adapts well to partially shaded, moist areas where many other natives struggle.
In an HOA neighborhood
American Willowherb takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Spreads aggressively and can look weedy
- May be perceived as too wild or uncontrolled
- Dies back completely in winter leaving bare patches
Wildlife value
The flowers attract various bees and butterflies throughout the long blooming season. Seeds provide food for birds, and the plant serves as a host for some moth caterpillars.
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.
Does American Willowherb fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.