How much sun does Smoothstem sedge need?

Smoothstem sedge grows best in part shade conditions.

When does Smoothstem sedge bloom?

Smoothstem sedge blooms in May and June.

Where is Smoothstem sedge native?

Smoothstem sedge (Carex laeviculmis) is native to CA, CO, ID, MT and 3 more states, per the World Checklist of Vascular Plants (Kew).

Smoothstem sedge

Name: Pollinator Patch
Author: Pollinator Patch

Carex laeviculmis

Last reviewed: September 2026

Smoothstem sedge (Carex laeviculmis) is a perennial grass native to CA, CO, ID, MT and 3 more states. It blooms in May and June.

Toxicity unknown

Smoothstem sedge (Carex laeviculmis) 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.

Light

part shade

Water

medium

Size

8"–20" H × 12"–18" W

Bloom

May, Jun

Native to

CA, CO, ID, MT and 3 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 460 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Picture natives in your own yard

Upload a photo of your yard and Patch Vision shows a rendering of it planted with natives for your region, like Smoothstem sedge.

Try it with your yard

Browse plants for this ecoregion

Coast Range Puget Lowland Northwestern Forested Mountains Sierra Nevada North American Deserts

A fine-textured, tufted sedge with thin, arching, bright green leaves that form small clumps. Grows in moist, shaded seeps and streambanks in mixed conifer forest.

Growing Smoothstem sedge

Grow Smoothstem sedge in part shade and medium water. Mature plants reach 8 to 20 inches tall and spread 12 to 18 inches wide.

Wildlife value

The fine foliage provides cover for small insects and amphibians near seasonal seeps, and the seeds are eaten by small birds.

Common questions

How much sun does Smoothstem sedge need?: Smoothstem sedge grows best in part shade conditions.
When does Smoothstem sedge bloom?: Smoothstem sedge blooms in May and June.
Where is Smoothstem sedge native?: Smoothstem sedge (Carex laeviculmis) is native to CA, CO, ID, MT and 3 more states, per the World Checklist of Vascular Plants (Kew).

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

Ready to grow Smoothstem sedge? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

Add this plant to your garden

iPhone app Android app