Sawatch Knotweed
Polygonum sawatchense
Last reviewed: June 2026
Light
part sun
Water
medium
Size
6"–12" H × 6"–12" W
Bloom
Jul, Aug, Sep
Native to
AZ, CA, CO, ID and 10 more states
Pollinators
bees, beetles
Browse plants for this ecoregion
Sawatch knotweed is a compact native perennial that forms low mounds of small leaves with clusters of tiny white or pink flowers from summer into fall. This alpine species stays neat and tidy, making it suitable for rock gardens or as a groundcover in partially sunny areas.
In an HOA neighborhood
Sawatch Knotweed is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
Wildlife value
The small flowers attract bees and beetles during the late summer blooming period. As a native wildflower, it provides habitat value for local pollinators.
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 Sawatch Knotweed fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.