Swamp Rosemallow
Hibiscus grandiflorus
Last reviewed: June 2026
Hibiscus grandiflorus is a native wetland perennial producing large pink or white flowers from June through September across the southeastern United States from Texas to South Carolina.
Light
full sun
Water
high
Size
36"–96" H × 24"–48" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, FL, GA, LA and 3 more states
Pollinators
bees, butterflies, beetles
Swamp rosemallow produces spectacular large pink or white hibiscus flowers up to 8 inches across from summer through early fall. This tall native perennial thrives in consistently moist conditions and can reach 8 feet in height. It dies back completely in winter but returns reliably each spring.
Growing Swamp Rosemallow
Grow Swamp Rosemallow in full sun and high water. Mature plants reach 36 to 96 inches tall and spread 24 to 48 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Swamp Rosemallow takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Grows very tall and can appear overgrown
- Dies back completely leaving bare stems in winter
- Requires consistently wet soil conditions
Wildlife value
The large showy blooms attract bees, butterflies, and beetles throughout the long flowering season. Seeds provide food for birds in fall and winter.
Common questions
- Where does Hibiscus grandiflorus naturally grow?
- Hibiscus grandiflorus is native to wetland areas across seven southeastern states: Alabama, Florida, Georgia, Louisiana, Mississippi, South Carolina, and Texas.
- When does Swamp Rosemallow bloom?
- Hibiscus grandiflorus blooms from June through September, producing large showy flowers that can reach 6-8 inches across.
- What pollinators visit Hibiscus grandiflorus?
- Swamp Rosemallow attracts various pollinators including native bees, butterflies, and beetles that are drawn to its large, nectar-rich flowers.
- What growing conditions does Swamp Rosemallow prefer?
- Hibiscus grandiflorus thrives in consistently moist to wet soils and full sun conditions, making it ideal for rain gardens, pond edges, and boggy areas.
- Is Swamp Rosemallow HOA-friendly?
- Swamp Rosemallow 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 Swamp Rosemallow? 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