Carex platyphylla aka Broad Leaved Sedge

Carex platyphylla is a perennial in the sedge family, Cyperaceae. Its common names include broadleaf sedge and silver sedge. It comes from northeastern North America, including Canada and the United States. In North Carolina, it grows in scattered western and central sites. It is uncommon in that state. Its species name comes from Greek words meaning broad leaf. This woodland plant grows slowly and forms clumps.

The leaves give this sedge most of its garden interest. They are broad for a sedge, with a long, strap-like shape. A light, glaucous coating gives the green leaves a blue tint. Their surface has a glossy, papery feel. Each leaf is simple, with smooth edges and no hairs. Leaves grow in an alternate pattern and have sheathing bases. They measure about 0.25–0.5 feet [0.08–0.15 metres] long. Their width stays below 0.08 feet [0.025 metres]. The foliage provides a lasting display. The stems have no scent.

Small flowers appear in spikes from April through June. They draw less attention than the broad leaves. Individual flowers measure less than 0.08 feet [0.025 metres] across. The fruits are achenes, which appear from May through July. Birds and small mammals eat these fruits. They also use the plants as cover. Some satyrine butterflies use this sedge to feed their larvae. These links make it useful in gardens planned for wildlife.

Grow broadleaf sedge in partial or full shade. It suits deep shade with little or no direct sun. Moist soil rich in organic matter matches its woodland needs. It accepts acid to neutral soil. Although it prefers moisture, it also tolerates drought and dry soil. North Carolina State Extension lists it for USDA zones 4a through 8b. Gardeners can raise new plants from seed or by division. Its slow growth and low upkeep suit shaded planting schemes.

Use it in woodland, native, rock, or butterfly gardens. It also suits a shaded spot beside a stream. Group plants as ground cover, or use them along borders. Keep them away from routes where people walk over plants. This sedge does not tolerate foot traffic. Deer resistance makes it an option where hostas suffer browsing. North Carolina State Extension reports no serious plant problems. The supplied evidence does not establish human edibility or toxicity.