Pleatleaf Knotweed
Polygonum tenue
Last reviewed: June 2026
Light
part sun
Water
medium
Size
4"–16" H × 2"–8" W
Bloom
Jul, Aug, Sep
Native to
AL, AR, CT, DE and 30 more states
Pollinators
bees, beetles
Browse plants for this ecoregion
Pleatleaf knotweed is a small annual wildflower that grows in low, spreading clumps. It produces tiny white or pinkish flowers from July through September and thrives in partial sun with moderate moisture. This delicate plant typically reaches only 4 to 16 inches tall with a modest spread.
In an HOA neighborhood
Pleatleaf Knotweed 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.
- Extremely small and inconspicuous appearance
- Annual nature means gaps in coverage
- Can appear weedy or unkempt
Wildlife value
The summer blooms provide nectar for native bees and beetles during the mid to late growing season. As a native annual, it also contributes to the local ecosystem's plant diversity.
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 Pleatleaf Knotweed fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.