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Interior Rush

Juncus interior

Last reviewed: October 2026

Interior Rush (Juncus interior)
Photo: (c) Nathan Aaron, some rights reserved (CC BY), uploaded by Nathan Aaron

Toxicity unknown

Interior Rush (Juncus interior) 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 Interior Rush as toxic to livestock.

Light

full sun

Water

medium

Size

6"–24" H × 2"–8" W

Bloom

Jun, Jul, Aug

Native to

AL, AR, AZ, CO and 20 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 459 programs across 44 states, each with a link to the provider and the date we last checked it.

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Browse plants for this ecoregion

Northwestern Forested MountainsNorth American DesertsSouthern RockiesArizona/New Mexico MountainsChihuahuan DesertsHigh PlainsSouthwestern TablelandsCentral Great PlainsGreat PlainsCross TimbersEdwards PlateauTexas Blackland PrairiesEast Central Texas PlainsWestern Gulf Coastal PlainSouth Central PlainsEastern Temperate ForestsOzark HighlandsCentral Irregular PlainsNorthwestern Glaciated PlainsNorthwestern Great PlainsNorthern Glaciated PlainsWestern Corn Belt PlainsNorthern Lakes and ForestsNorth Central Hardwood ForestsDriftless AreaSoutheastern Wisconsin Till PlainsCentral Corn Belt PlainsEastern Corn Belt PlainsInterior River Valleys and HillsMississippi Alluvial PlainMadrean ArchipelagoSonoran Basin and Range

Interior rush is a native grass-like perennial that forms neat, upright clumps of slender green stems. It produces small, inconspicuous flowers in summer and maintains a tidy, fountain-like appearance throughout the growing season.

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In an HOA neighborhood

Interior Rush is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.

Works well in: front yard, foundation, street edge, mid zone.

Wildlife value

This rush provides nesting material and cover for birds, while its seeds feed small songbirds and waterfowl.

Common questions

How much sun does Interior Rush need?
Interior Rush grows best in full sun conditions.
When does Interior Rush bloom?
Interior Rush blooms in June, July, and August.
Where is Interior Rush native?
Interior Rush (Juncus interior) is native to AL, AR, AZ, CO and 20 more states, per the World Checklist of Vascular Plants (Kew).
Is Interior Rush toxic to livestock?
The USDA PLANTS Database does not flag Interior Rush as toxic to livestock.
Is Interior Rush HOA-friendly?
Interior Rush is generally an HOA-friendly choice in the right placement, with low maintenance.

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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