Marsh Arrow-grass
Triglochin palustris
Last reviewed: June 2026
Light
full sun
Water
high
Size
4"–16" H × 2"–8" W
Bloom
May, Jun, Jul, Aug, Sep
Native to
AZ, CA, CO, IA and 22 more states
Browse plants for this ecoregion
Marsh arrow-grass is a slender wetland perennial with narrow, grass-like leaves that forms small clumps in consistently moist to wet soils. It produces inconspicuous spikes of tiny greenish flowers from late spring through early fall. This plant thrives in full sun and requires constant moisture, making it ideal for rain gardens or bog areas.
In an HOA neighborhood
Marsh Arrow-grass 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.
- Requires constantly wet conditions that may create drainage concerns
- Grass-like appearance could be mistaken for unmaintained turf
- Inconspicuous flowers provide little ornamental appeal
Wildlife value
While specific pollinator data is limited, this native wetland plant likely provides habitat value for moisture-loving insects and small wildlife. Its seeds may provide food for waterfowl and wetland birds.
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 Arrow-grass fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.