Roundseed St. Johnswort
Hypericum sphaerocarpum
Last reviewed: June 2026
Light
full sun
Water
low
Size
12"–24" H × 12"–24" W
Bloom
Jun, Jul, Aug
Native to
AL, AR, GA, IA and 16 more states
Pollinators
bees, beetles
Browse plants for this ecoregion
Roundseed St. Johnswort is a compact native perennial that produces bright yellow flowers with prominent stamens from June through August. This drought-tolerant plant forms neat, rounded clumps and requires minimal care once established in sunny locations.
In an HOA neighborhood
Roundseed St. Johnswort is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.
Works well in: mid zone, foundation, backyard only.
- May look sparse in winter as deciduous perennial
- St. Johnswort name might concern uninformed neighbors
Wildlife value
The cheerful yellow blooms attract native bees and beetles during the summer months. Seeds provide food for small birds and wildlife.
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 Roundseed St. Johnswort fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.