Roundseed St. Johnswort
Hypericum sphaerocarpum
Last reviewed: July 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.
- 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.
Common questions
- How much sun does Roundseed St. Johnswort need?
- Roundseed St. Johnswort grows best in full sun conditions.
- When does Roundseed St. Johnswort bloom?
- Roundseed St. Johnswort blooms in June, July, and August.
- Where is Roundseed St. Johnswort native?
- Roundseed St. Johnswort (Hypericum sphaerocarpum) is native to AL, AR, GA, IA and 16 more states, per the USDA PLANTS Database and regional native plant society lists.
- What pollinators does Roundseed St. Johnswort attract?
- Roundseed St. Johnswort draws bees and beetles.
- Is Roundseed St. Johnswort HOA-friendly?
- Roundseed St. Johnswort 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 Roundseed St. Johnswort? 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