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Smallhead Rush

Juncus brachycephalus

Last reviewed: August 2026

Smallhead Rush (Juncus brachycephalus)
Photo: Robert H. Mohlenbrock. USDA NRCS. 1995. Northeast wetland flora: Field office guide to plant species. Northeast National Technical Center, Chester. Courtesy of USDA NRCS Wetland Science Institute. / Wikimedia Commons (Public domain)

Toxicity unknown

Smallhead Rush (Juncus brachycephalus) 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 Smallhead Rush as toxic to livestock.

Light

part sun

Water

high

Size

4"–12" H × 2"–6" W

Bloom

Jun, Jul, Aug

Native to

AL, AR, CO, CT and 18 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 452 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

Northern Lakes and ForestsNorth Central Hardwood ForestsSoutheastern Wisconsin Till PlainsCentral Corn Belt PlainsEastern Corn Belt PlainsSouthern Michigan/Northern Indiana Drift PlainsHuron/Erie Lake PlainsNortheastern HighlandsNortheastern Coastal ZoneRidge and ValleyAcadian Plains and HillsEastern Great Lakes Lowlands

Smallhead rush is a compact native sedge that forms small clumps with narrow, grass-like foliage. It produces inconspicuous flower clusters from June through August and thrives in consistently moist to wet conditions.

In an HOA neighborhood

Smallhead Rush takes more care to keep looking intentional in a front yard. Maintenance level: moderate. 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 problematic in front yards
  • Rush-like appearance may be perceived as weedy or unintentional
  • Very specialized growing requirements limit placement options

Wildlife value

This rush provides habitat and nesting material for wetland birds and supports various insects that depend on native sedges.

Common questions

How much sun does Smallhead Rush need?
Smallhead Rush grows best in part sun conditions.
When does Smallhead Rush bloom?
Smallhead Rush blooms in June, July, and August.
Where is Smallhead Rush native?
Smallhead Rush (Juncus brachycephalus) is native to AL, AR, CO, CT and 18 more states, per the World Checklist of Vascular Plants (Kew).
Is Smallhead Rush toxic to livestock?
The USDA PLANTS Database does not flag Smallhead Rush as toxic to livestock.
Is Smallhead Rush HOA-friendly?
Smallhead 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.

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.

See all plant problem guides

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