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 World Checklist of Vascular Plants (Kew).

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.

Dwarf Spike-rush

Name: Pollinator Patch
Author: Pollinator Patch

Eleocharis parvula

Last reviewed: August 2026

Toxicity unknown

Dwarf Spike-rush (Eleocharis parvula) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

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

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 437 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Browse plants for this ecoregion

Southern Rockies High Plains Southwestern Tablelands Central Great Plains Cross Timbers Western Gulf Coastal Plain South Central Plains Central Irregular Plains Northeastern Coastal Zone Middle Atlantic Coastal Plain Northern Piedmont Southeastern Plains Interior River Valleys and Hills Mississippi Alluvial Plain Southern Coastal Plain Acadian Plains and Hills Atlantic Coastal Pine Barrens

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 World Checklist of Vascular Plants (Kew).
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 World Checklist of Vascular Plants (Kew). 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.

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