Mountain Sweetroot
Osmorhiza chilensis
Last reviewed: July 2026
Light
part shade
Water
medium
Size
12"–36" H × 6"–18" W
Bloom
May, Jun, Jul
Native to
CA, CO, ID, MT and 4 more states
Pollinators
bees, beetles
Browse plants for this ecoregion
Mountain sweetroot is a delicate native wildflower with fern-like foliage and small white flower clusters that bloom from May through July. This shade-loving perennial grows 1-3 feet tall and prefers consistent moisture, making it ideal for woodland gardens or shaded borders. The plant dies back completely in winter but returns reliably each spring.
In an HOA neighborhood
Mountain Sweetroot 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.
- Looks very wild and weedy to untrained eyes
- Completely disappears in winter leaving bare spots
- Delicate appearance lacks the substance HOAs expect
Wildlife value
The small white flowers attract native bees and beetles during the summer blooming period. It provides natural habitat value for local pollinators.
Common questions
- How much sun does Mountain Sweetroot need?
- Mountain Sweetroot grows best in part shade conditions.
- When does Mountain Sweetroot bloom?
- Mountain Sweetroot blooms in May, June, and July.
- Where is Mountain Sweetroot native?
- Mountain Sweetroot (Osmorhiza chilensis) is native to CA, CO, ID, MT and 4 more states, per the USDA PLANTS Database and regional native plant society lists.
- What pollinators does Mountain Sweetroot attract?
- Mountain Sweetroot draws bees and beetles.
- Is Mountain Sweetroot HOA-friendly?
- Mountain Sweetroot 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 Mountain Sweetroot? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz