Annual Agoseris
Agoseris heterophylla
Last reviewed: June 2026
Annual Agoseris is a native wildflower found across the western United States from California to Montana. This drought-tolerant forb blooms yellow flowers from April through July and attracts bees and butterflies.
Light
full sun
Water
low
Size
4"–24" H × 2"–12" W
Bloom
Apr, May, Jun, Jul
Native to
AZ, CA, ID, MT and 5 more states
Pollinators
bees, butterflies
Browse plants for this ecoregion
Annual agoseris is a low-growing wildflower that produces bright yellow dandelion-like blooms from spring through summer. This native forb forms compact rosettes of leaves with flowers held on short stems, thriving in sunny locations with minimal water once established.
Growing Annual Agoseris
Grow Annual Agoseris in full sun and low water. Mature plants reach 4 to 24 inches tall and spread 2 to 12 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Annual Agoseris 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.
- Strongly resembles dandelions which many consider weeds
- Annual nature means gaps when plants don't return
- Can appear unkempt as flowers fade and go to seed
Wildlife value
The cheerful yellow flowers attract native bees and butterflies throughout the long blooming season. As an annual, it provides consistent nectar sources from April through July.
Common questions
- When does Annual Agoseris bloom?
- Annual Agoseris typically blooms from April through July, producing bright yellow dandelion-like flowers.
- Where is Annual Agoseris native?
- This wildflower is native to nine western states: Arizona, California, Idaho, Montana, New Mexico, Nevada, Oregon, Utah, and Washington.
- What pollinators visit Annual Agoseris?
- Annual Agoseris attracts various bees and butterflies with its yellow composite flowers during the spring and summer months.
- What growing conditions does Annual Agoseris prefer?
- Annual Agoseris thrives in full sun locations with low water requirements, making it well-suited to dry western climates and drought-tolerant gardens.
- Is Annual Agoseris HOA-friendly?
- Annual Agoseris 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 USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Annual Agoseris? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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