Horseweed
Erigeron canadensis
Last reviewed: June 2026
Light
full sun
Water
low
Size
12"–60" H × 6"–24" W
Bloom
Jul, Aug, Sep, Oct
Native to
AL, AR, AZ, CA and 43 more states
Pollinators
bees, beetles, flies
Browse plants for this ecoregion
Horseweed is a tall annual wildflower that grows rapidly from spring through fall, producing small white daisy-like flowers in dense clusters. This pioneer species thrives in disturbed soils and poor conditions where other plants struggle. It self-seeds readily and can become quite abundant in suitable locations.
In an HOA neighborhood
Horseweed 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.
- Often considered a weed due to weedy appearance
- Self-seeds aggressively and can spread rapidly
- Tall gangly growth habit looks unkempt in formal settings
Wildlife value
The abundant small flowers provide nectar for bees, beneficial flies, and beetles from mid-summer through fall. Seeds feed birds and small mammals in winter.
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 Horseweed fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.