grass

Copper Shouldered Oval Sedge

Carex bicknellii

Essentials

At a Glance

Plant Type

Grass

Height

36 inches

Width

18 inches

Light

Full Sun

Zones

4, 5, 6, 7

Water

Low to moderate

Humidity

Adaptable

Lifespan

Perennial

Native To

Central and Eastern North America

Toxicity

Non-toxic

The Story

Plant Bio

Carex bicknellii is a native sedge of North American prairies and savannas. It forms upright, vase-shaped clumps and is notable for its tolerance of dry, sunny conditions where many other sedges fail. Its common name refers to the attractive, oval seed heads that emerge green in late spring and mature to a distinct coppery-brown color, providing unique textural and color interest.

Bloom Period:

EarlyLate

Uses & Benefits:

The main ornamental feature is the unique, coppery seed heads that rise above the foliage in summer. Its upright, clumping habit provides fine texture and a vertical element that contrasts well with flowering prairie perennials.

It is an excellent, low-maintenance choice for stabilizing soils in dry, sunny locations. Its adaptability to various soil types, including clay, makes it a versatile plant for challenging sites.

As a native prairie plant, it is a crucial part of its ecosystem. It is a larval host plant for several species of skipper butterflies and the seeds are an important food source for songbirds and game birds.

Planting

How to Grow

Select a site in full sun with well-drained soil.
This sedge is adaptable to sand, loam, or clay.
Dig a hole just large enough for the plant's root ball.
Set the plant in the hole at the same level it was growing in the pot.
Backfill and firm the soil gently.
Water at planting and periodically during the first season.

Pro Tip

This sedge thrives in the lean, dry soils of its native prairie habitat; avoid overly rich soil and excessive watering to prevent flopping.

Keep It Thriving

Care Guide

Do

Provide a location in full, direct sunlight.
Embrace its tolerance for dry and poor soils.
Plant in groups or drifts for the best visual impact.
Allow seed heads to remain for visual interest and to feed birds.

Don't

Do not plant in wet or shady locations.
Avoid amending the soil with rich compost or fertilizer.
Don't overwater once the plant is established.
Don't expect it to be evergreen; it is a cool-season sedge that goes dormant.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Essential component of prairie restorationsTextural element in dry, sunny bordersLow-maintenance native for naturalistic gardens

Companion Plants

Echinacea purpurea Liatris spicata Schizachyrium scoparium Rudbeckia hirta Asclepias tuberosa

Multiply

Propagation Methods

Good to Know

Common Questions

Copper Shouldered Oval Sedge questions

What zones can Copper Shouldered Oval Sedge grow in?

Copper Shouldered Oval Sedge is hardy in USDA Zones 4–7. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Copper Shouldered Oval Sedge deer resistant?

Yes — Copper Shouldered Oval Sedge is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Copper Shouldered Oval Sedge bloom?

Copper Shouldered Oval Sedge typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Copper Shouldered Oval Sedge need full sun?

Copper Shouldered Oval Sedge does best in full sun (6+ hours).

Is Copper Shouldered Oval Sedge drought tolerant?

Yes — once established (usually after the first full season), Copper Shouldered Oval Sedge handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.