perennial

Broadleaf Sedge

Carex platyphylla

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

12 inches

Width

12 inches

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8

Water

Medium to wet

Humidity

Moderate to high

Lifespan

Perennial

Native To

Eastern North America

Toxicity

Non-toxic to humans and pets

The Story

Plant Bio

Carex platyphylla is a clumping, perennial sedge known for its distinctively broad, strap-like, blue-green to silvery-blue leaves. It forms dense tufts and produces inconspicuous greenish-brown flower spikes in spring. It is a valuable groundcover for shady woodland gardens. The most notable feature is its unusually wide (up to 1 inch), semi-evergreen foliage, which has a striking silvery-blue or blue-green color that brightens shady areas. It is deer resistant and provides texture and color year-round in its native range.

Bloom Period:

EarlyLate

Uses & Benefits:

Provides fine texture and year-round interest, especially in shaded or wet areas.

Excellent for erosion control on moist slopes and borders.

Supports native wetland ecosystems and provides habitat for insects.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds or divisions into moist soil in early spring.
Water regularly to keep soil evenly moist, especially during dry spells.
Apply a balanced fertilizer in early spring for healthy growth.
Mulch around plants to retain moisture and suppress weeds.
Divide every 3–4 years in early spring or fall to maintain vigor.
Prune dead or damaged foliage in late winter.

Pro Tip

Plant in partial shade with moist, well-drained soil for best results.

Keep It Thriving

Care Guide

Do

Keep soil consistently moist 🌱
Mulch to retain moisture and regulate temperature
Divide every few years to prevent overcrowding

Don't

Avoid dry or overly compacted soils ❌
Don't let soil dry out completely
Refrain from heavy fertilization

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Mulch
Plant
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Wet meadow borderSilvery groundcoverTextural contrast in perennial beds

Companion Plants

Sedges Ferns Hostas Japanese iris Swamp milkweed

Multiply

Propagation Methods

Good to Know

Common Questions

Broadleaf Sedge questions

What zones can Broadleaf Sedge grow in?

Broadleaf Sedge is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Broadleaf Sedge deer resistant?

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

When does Broadleaf Sedge bloom?

Broadleaf Sedge typically blooms in early spring through mid-spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Broadleaf Sedge need full sun?

Broadleaf Sedge does best in part shade.