Dwarf Spike-rush
Eleocharis parvula
Last reviewed: June 2026
The USDA PLANTS Database (opens in new tab) does not flag Dwarf Spike-rush as toxic to livestock.
Light
part shade
Water
high
Size
2"–6" H × 1"–3" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, CA, CO and 23 more states
Browse plants for this ecoregion
Dwarf spike-rush is a tiny grass-like perennial that forms dense, low carpets in wet areas. It stays extremely short at 2-6 inches tall and produces small spike-like flowers from summer through early fall.
In an HOA neighborhood
Dwarf Spike-rush 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 consistently wet soil conditions
- Can appear sparse or patchy in typical landscapes
- May look like weedy grass to uninformed observers
Wildlife value
This plant provides habitat for wetland insects and small wildlife, though it has limited appeal to most pollinators due to its wind-pollinated nature.
Common questions
- How much sun does Dwarf Spike-rush need?
- Dwarf Spike-rush grows best in part shade conditions.
- When does Dwarf Spike-rush bloom?
- Dwarf Spike-rush blooms in June, July, August, and September.
- Where is Dwarf Spike-rush native?
- Dwarf Spike-rush (Eleocharis parvula) is native to AL, AR, CA, CO and 23 more states, per the USDA PLANTS Database and regional native plant society lists.
- Is Dwarf Spike-rush toxic to livestock?
- The USDA PLANTS Database does not flag Dwarf Spike-rush as toxic to livestock.
- Is Dwarf Spike-rush HOA-friendly?
- Dwarf Spike-rush 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 Dwarf Spike-rush? 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