Marsh Flat Sedge
Cyperus pseudovegetus
Last reviewed: June 2026
Light
part sun
Water
high
Size
12"–36" H × 6"–18" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, DE, FL and 18 more states
Browse plants for this ecoregion
Marsh flat sedge is a native grass-like perennial that forms neat clumps with triangular stems and small brown flower clusters. It thrives in consistently moist to wet soils and provides excellent texture contrast in rain gardens and water-wise landscapes. This sedge maintains a tidy appearance throughout the growing season.
In an HOA neighborhood
Marsh Flat Sedge is an HOA-friendly choice. Maintenance level: moderate. Tidiness: 4 out of 5.
Works well in: foundation, mid zone, backyard only.
- Requires consistently wet soil which may be difficult to maintain
- May appear sparse in drier conditions
Wildlife value
The seeds provide food for waterfowl and songbirds, while the dense growth offers nesting material and shelter for small wildlife.
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 Marsh Flat Sedge fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.