Horseweed (Erigeron canadensis)

Horseweed is a fast-growing annual in the daisy family that often appears in disturbed ground, roadsides, and waste areas. It forms a low rosette before sending up a tall, narrow flowering stem, and can become an aggressive weed where it is not wanted. ## Identification and Habitat Mature plants carry many small flower heads and disperse seed on wind-borne tufts. North Carolina State Extension gives a broad height range of 6 inches to 7 feet and a width of 6 inches to 2 feet, reflecting how strongly growth depends on site conditions. It is common in disturbed places and may volunteer in gardens. [NC State Extension](https://plants.ces.ncsu.edu/plants/erigeron-canadensis/common-name/horseweed/) notes that its flowers provide nectar and pollen for native bees and that its dead stems can serve as nesting sites for solitary bees. ## Garden Use This plant is generally best treated as a spontaneous wild plant rather than a selected ornamental. Consider local weed guidance before allowing it to set seed, especially in cultivated beds or nearby fields. Its ecological value for bees can be weighed against its tendency to spread. ## Maintenance Pull or cut unwanted plants before seed heads mature. Where stems are retained for nesting bees, remove them after the nesting season and before seed dispersal, following local extension guidance.