Carex pensylvanica

Common Names

Pennsylvania Sedge, Oak Sedge

Summary

Carex pensylvanica is a native North American sedge with a fine-textured, grass-like habit that forms loose colonies or dense mats via rhizomes, grows about 6–12 inches tall, and features arching, semi-evergreen leaves with small, inconspicuous spikelets on flowering culms in spring, creating a delicate green ground cover that blends into woodland and thicket settings. In cultivation, it tolerates sun to shade on well-drained soils from dry to moist, with best performance in partial shade and loamy to sandy textures, hardy in USDA zones 3–8. It spreads slowly by rhizomes to make a durable ground cover suitable as a lawn substitute in shady areas, provides erosion control, is deer resistant, and supports wildlife. Propagation is typically by division, as seed germination is difficult; maintenance is low, with mowing 2–3 times per year to about 2 inches and minimal irrigation once established.

Lifecycle

Perennial

Height

6-12 inches

Spread

6-12 inches

Hardiness Zones

Zones 3-8

Sunlight Requirements

Ideal sunlight: Full Shade; tolerates Partial Shade, Partial Sun, and Full Sun depending on climate.

Soil Type

Well-drained, dry to dry-moist soil, preferably loamy or sandy, with pH about 5.5–7.0

Soil Drainage

Well-drained soil (sandy loam to loam that drains well and dries to medium-moisture; avoid compacted or poorly drained soils).

Soil pH

Tolerates all pH levels

Bloom Color

Green

Bloom Time

Spring

Foliage Color

Green

Fall Foliage Color

Sandy-tan

Leaf Lifecycle

Semi-deciduous

Growth Rate

Slow growth, 3–6 inches per year

Seasons of Interest

Spring, Summer, Fall, Winter

Propagation Methods

Division, Seeds

Attracts Wildlife

Attracts birds and butterflies