What kind of habitat does needle spike-rush prefer?

Needle spike-rush grows in shallow standing water and consistently saturated soil, such as pond margins, ditches, and the edges of slow streams.

How much sun does needle spike-rush need?

It grows best in full sun to part shade, tolerating some shading as long as the soil or water it sits in stays wet.

When does needle spike-rush bloom?

Its inconspicuous flower spikes appear from May through September.

Does needle spike-rush attract pollinators?

No specific pollinator relationships have been documented for this plant; its flowers are small and wind or self-pollinated rather than insect-driven.

How is needle spike-rush used in landscaping?

It is often planted along pond edges and rain garden margins to form a low, grass-like mat that stabilizes wet soil.

Is Needle Spike-rush toxic to livestock?

The USDA PLANTS Database does not flag Needle Spike-rush as toxic to livestock.

Is Needle Spike-rush HOA-friendly?

Needle 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.

Needle Spike-rush

Name: Pollinator Patch
Author: Pollinator Patch

Eleocharis acicularis

Last reviewed: September 2026

Needle spike-rush is a fine, hair-like sedge that forms low mats in shallow pond edges, wet meadows, and streambanks, blooming from May through September.

Toxicity unknown

Needle Spike-rush (Eleocharis acicularis) 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 Needle Spike-rush as toxic to livestock.

Light

part shade

Water

high

Size

2"–10" H × 1"–4" W

Bloom

May, Jun, Jul, Aug, Sep

Native to

AL, AR, AZ, CA and 44 more states

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Needle spike-rush is a delicate native grass that forms small, neat clumps of thin, needle-like foliage. This diminutive plant produces tiny spikes of inconspicuous flowers from late spring through early fall and thrives in consistently moist to wet conditions.

Growing Needle Spike-rush

Grow Needle Spike-rush in part shade and high water. Mature plants reach 2 to 10 inches tall and spread 1 to 4 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Needle Spike-rush takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Requires consistently wet conditions that may look messy
Very small size and informal appearance unsuitable for front yards
May appear sparse or patchy in typical landscape settings

Wildlife value

This plant provides habitat and food for wetland wildlife and waterfowl. The seeds are eaten by various birds, and the plant structure offers shelter for small aquatic creatures.

Common questions

What kind of habitat does needle spike-rush prefer?: Needle spike-rush grows in shallow standing water and consistently saturated soil, such as pond margins, ditches, and the edges of slow streams.
How much sun does needle spike-rush need?: It grows best in full sun to part shade, tolerating some shading as long as the soil or water it sits in stays wet.
When does needle spike-rush bloom?: Its inconspicuous flower spikes appear from May through September.
Does needle spike-rush attract pollinators?: No specific pollinator relationships have been documented for this plant; its flowers are small and wind or self-pollinated rather than insect-driven.
How is needle spike-rush used in landscaping?: It is often planted along pond edges and rain garden margins to form a low, grass-like mat that stabilizes wet soil.
Is Needle Spike-rush toxic to livestock?: The USDA PLANTS Database does not flag Needle Spike-rush as toxic to livestock.
Is Needle Spike-rush HOA-friendly?: Needle 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.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

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