Sulphur Cosmos
Cosmos sulphureus
Last reviewed: June 2026
Cosmos sulphureus is a vibrant yellow-flowered native forb found in North Carolina that blooms from June through October. This drought-tolerant wildflower thrives in full sun and attracts bees and butterflies to the garden.
Light
full sun
Water
medium
Size
12"–48" H × 12"–24" W
Bloom
Jun, Jul, Aug, Sep, Oct
Native to
NC
Pollinators
bees, butterflies
Sulphur cosmos is a cheerful annual wildflower that produces bright yellow to orange daisy-like blooms from early summer through frost. This easy-growing plant thrives in full sun and poor to average soils, making it perfect for naturalizing or filling gaps in flower beds. It self-seeds readily and attracts numerous pollinators throughout its long blooming season.
Growing Sulphur Cosmos
Grow Sulphur Cosmos in full sun and medium water. Mature plants reach 12 to 48 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Sulphur Cosmos is an HOA-friendly choice. Maintenance level: low. Tidiness: 2 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- May self-seed prolifically if not deadheaded
Wildlife value
This cosmos variety is excellent for supporting bees and butterflies with its abundant nectar-rich flowers. The long bloom period from June through October provides consistent food sources when many other flowers have finished.
Common questions
- When does Cosmos sulphureus bloom?
- Cosmos sulphureus blooms from June through October, providing months of continuous color in late spring through fall.
- What pollinators visit Cosmos sulphureus?
- Cosmos sulphureus attracts bees and butterflies, making it an excellent choice for pollinator gardens and native plant landscapes.
- Where is Cosmos sulphureus native?
- Cosmos sulphureus is native to North Carolina and other southeastern states, where it grows naturally in open areas and disturbed soils.
- What growing conditions does Cosmos sulphureus prefer?
- This native forb thrives in full sun with medium water requirements, though it can tolerate some drought once established.
- Is Sulphur Cosmos HOA-friendly?
- Sulphur Cosmos is generally an HOA-friendly choice in the right placement, with low maintenance.
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 Sulphur Cosmos? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz