Purple Locoweed
Astragalus mollissimus
Last reviewed: June 2026
Purple Locoweed (Astragalus mollissimus) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org, last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
6"–24" H × 6"–18" W
Bloom
May, Jun, Jul
Native to
AZ, CO, ID, KS and 8 more states
Pollinators
bees, butterflies
Browse plants for this ecoregion
Purple locoweed is a low-growing native wildflower that produces clusters of purple pea-like flowers from May through July. This drought-tolerant perennial forms compact mounds and thrives in full sun with minimal water once established.
In an HOA neighborhood
Purple Locoweed 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.
- Contains toxic compounds that are harmful to livestock and potentially pets
- Common name includes 'weed' which creates negative perception
- Wild appearance may not meet formal landscaping standards
Wildlife value
The flowers attract bees and butterflies during the spring and summer blooming period. As a member of the legume family, it also helps fix nitrogen in the soil.
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 Purple Locoweed fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.