Glade-mallow
Napaea dioica
Last reviewed: June 2026
Napaea dioica (Glade-mallow) is a native perennial forb found in the upper Midwest and select eastern states, blooming white flowers from June through August in moist, partially shaded areas.
Light
part sun
Water
medium
Size
36"–72" H × 24"–36" W
Bloom
Jun, Jul, Aug
Native to
IA, IL, IN, MD and 4 more states
Pollinators
bees, beetles
Glade-mallow is a tall native perennial with white clustered flowers that bloom through summer. This robust plant forms upright clumps and thrives in partial sun with moderate moisture. It works well as a background plant in native gardens and naturalized areas.
Growing Glade-mallow
Grow Glade-mallow in part sun and medium water. Mature plants reach 36 to 72 inches tall and spread 24 to 36 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Glade-mallow takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Very tall growth creates informal appearance
- Can look sparse or weedy when not in bloom
- May appear too wild for formal landscapes
Wildlife value
The white summer flowers attract various bees and beetles for nectar and pollen. Its sturdy structure provides habitat for beneficial insects throughout the growing season.
Common questions
- Where does Napaea dioica naturally grow?
- Glade-mallow is native to Iowa, Illinois, Indiana, Maryland, Minnesota, Ohio, Vermont, and Wisconsin, typically found in moist woodlands and stream banks.
- When does Glade-mallow bloom?
- Napaea dioica produces white flowers from June through August, providing summer nectar for pollinators.
- What pollinators visit Glade-mallow?
- The white flowers of Napaea dioica attract bees and beetles, which serve as important pollinators for this native species.
- What growing conditions does Napaea dioica prefer?
- Glade-mallow thrives in partial sun to light shade with medium to high moisture levels, making it ideal for woodland edges and stream banks.
- Is Glade-mallow HOA-friendly?
- Glade-mallow 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 Glade-mallow? 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