Carex sylvatica aka European Woodland Sedge

Carex sylvatica, or wood sedge, belongs to the sedge family, Cyperaceae. It is native to Europe and parts of Asia, reaching Iran. Its native range includes Britain and Ireland. People have introduced it to North America and New Zealand. It grows in woods that lose their leaves in winter, often on heavy soil. It also occurs in some open sites outside woodland.

This evergreen perennial forms dense clumps with a rounded shape. Its glossy green leaves are long and strap-shaped. Garden plants reach about 1.6–3.3 feet [0.5–1 metre] tall and wide. They take two to five years to reach full size. Curved flower stems have a yellow-green hue. The RHS places these stems in summer. Chicago Botanic Garden gives March to April as its bloom time. These sources differ on the flowering season.

Wood sedge grows in full sun or partial shade. It prefers moist soil and can cope with poor drainage. It also grows in moist soil that drains well. Chalk, clay, loam and sand all suit it. It accepts acid, neutral and alkaline soils. Damp ground beside a pond or stream suits its needs. The RHS gives it an H7 hardiness rating. Chicago Botanic Garden lists USDA zones 4–8.

The leaves give ground cover and keep their green colour through winter. Plants can grow beneath trees and shrubs, or on banks and slopes. They also suit beds, borders, pots and small courtyard gardens. The clumps provide cover for small wildlife, and the plant attracts birds. Plants For A Future describes it as resistant to deer. It also records fibre use and a past use as padding to hold heat.

The RHS reports few pest or disease problems. It lists wood sedge as a low-maintenance garden plant. Divide clumps in spring to make more plants. When needed, cut growth back by half between April and July. Avoid cutting it back in autumn or winter. Plants For A Future does not flag it as weedy. That source records no known food or medicinal uses. It also lists no known hazards, though this does not establish that every use is safe.