Glaucus Willowherb
Epilobium glaberrimum
Last reviewed: June 2026
Light
part sun
Water
medium
Size
8"–24" H × 6"–12" W
Bloom
Jun, Jul, Aug, Sep
Native to
AZ, CA, ID, MT and 5 more states
Pollinators
bees, butterflies
Browse plants for this ecoregion
Glaucous willowherb is a compact native perennial with narrow blue-green leaves and delicate pink to purple flowers. It blooms from summer into fall, forming small clumps that work well in mixed plantings or naturalized areas.
In an HOA neighborhood
Glaucus 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.
- Can appear weedy or wild to conventional gardeners
- May self-seed and spread beyond intended areas
- Goes fully dormant in winter leaving bare spots
Wildlife value
The long blooming period provides nectar for bees and butterflies throughout summer and fall. Seeds also attract small birds and the foliage may host butterfly larvae.
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 Glaucus Willowherb fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.