Thin-leaf Sunflower
Helianthus decapetalus
Last reviewed: June 2026
Light
full sun
Water
medium
Size
24"–60" H × 12"–24" W
Bloom
Jul, Aug, Sep
Native to
AL, AR, CT, DE and 26 more states
Pollinators
bees, butterflies, beetles
Thin-leaf sunflower is a native perennial that produces cheerful yellow daisy-like flowers from July through September. This clumping sunflower reaches 2-5 feet tall and spreads moderately, making it suitable for naturalized areas and pollinator gardens.
In an HOA neighborhood
Thin-leaf Sunflower is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 2 out of 5.
Works well in: mid zone, backyard only.
- Can look weedy when dormant in winter
- May appear too informal for formal landscapes
- Height and spread could seem uncontrolled to some HOAs
Wildlife value
Host plant for silvery checkerspot butterfly.
The bright yellow blooms attract bees, butterflies, and beetles throughout the summer and fall. Seeds provide food for birds, particularly goldfinches and other songbirds.
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 Thin-leaf Sunflower fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.