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 AZ, CA, CO, ID and 13 more states, per the World Checklist of Vascular Plants (Kew).

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.

Mountain Sweetroot

Name: Pollinator Patch
Author: Pollinator Patch

Osmorhiza chilensis

Last reviewed: August 2026

Light

part shade

Water

medium

Size

12"–36" H × 6"–18" W

Bloom

May, Jun, Jul

Native to

AZ, CA, CO, ID and 13 more states

Pollinators

bees, beetles

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 432 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Browse plants for this ecoregion

Coast Range Puget Lowland Marine West Coast Forest Northwestern Forested Mountains Sierra Nevada Central California Foothills and Coastal Mountains Southern California Mountains North American Deserts Central Basin and Range Southern Rockies Arizona/New Mexico Mountains Madrean Archipelago

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 AZ, CA, CO, ID and 13 more states, per the World Checklist of Vascular Plants (Kew).
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 World Checklist of Vascular Plants (Kew). 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.

Add this plant to your garden

iPhone app Android app

Not sure where to start? Take the 2-minute yard quiz