Whiteflower Leafcup
Polymnia canadensis
Last reviewed: June 2026
Polymnia canadensis (Whiteflower Leafcup) is a native forb blooming June through August across eastern and midwestern states. This shade-tolerant plant attracts bees, butterflies, and beetles with its white flowers.
Light
part shade
Water
medium
Size
12"–48" H × 12"–24" W
Bloom
Jun, Jul, Aug
Native to
AL, AR, CT, GA and 19 more states
Pollinators
bees, butterflies, beetles
Whiteflower leafcup is a native woodland perennial that produces clusters of small white flowers from June through August. This woodland plant thrives in partial shade with medium moisture and forms clumps 1-4 feet tall with a modest spread.
Growing Whiteflower Leafcup
Grow Whiteflower Leafcup in part shade 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
Whiteflower Leafcup 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.
- Large leaves can appear coarse and informal
- May look unkempt as it goes dormant
- Not commonly recognized as an ornamental plant
Wildlife value
The summer blooms attract bees, butterflies, and beetles, providing nectar during peak growing season. Seeds may also provide food for birds in late summer and fall.
Common questions
- When does Polymnia canadensis bloom?
- Whiteflower Leafcup blooms from June through August, producing white flowers that attract various pollinators.
- What pollinators visit Polymnia canadensis?
- Bees, butterflies, and beetles are the primary pollinators of Whiteflower Leafcup flowers.
- Where is Polymnia canadensis native?
- Whiteflower Leafcup is native to eastern and midwestern United States, ranging from Connecticut and Vermont south to Alabama and Georgia, and west to Kansas and Minnesota.
- What growing conditions does Polymnia canadensis prefer?
- This native forb tolerates partial sun to full shade conditions and adapts to various moisture levels, making it versatile for woodland gardens.
- Is Whiteflower Leafcup HOA-friendly?
- Whiteflower Leafcup 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 Whiteflower Leafcup? 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