Knotgrass
Paspalum distichum
Last reviewed: June 2026
Light
full sun
Water
high
Size
4"–24" H × 12"–36" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, AZ, CA and 22 more states
Browse plants for this ecoregion
Knotgrass is a low-growing native perennial that spreads by runners to form dense mats. It produces small seed heads from summer through early fall and thrives in wet conditions. This grass is commonly found in marshy areas and along pond edges.
In an HOA neighborhood
Knotgrass takes more care to keep looking intentional in a front yard. Maintenance level: high. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Aggressive spreading habit can appear uncontrolled
- High water requirements may conflict with water-wise landscaping preferences
- Can develop patchy or weedy appearance
Wildlife value
The seed heads provide food for waterfowl and songbirds. As a native grass, it offers nesting material and habitat 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 Knotgrass fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.