Carex pseudocyperus aka Cypress Like Sedge

Carex pseudocyperus is a perennial in the sedge family, Cyperaceae. Its common names include cyperus sedge and false bristly sedge. Its native range spans temperate and subtropical parts of the Northern Hemisphere. It also reaches the Philippines and New Zealand. It is native to Britain and Ireland. Chicago Botanic Garden also records it as a Midwest native.

This deciduous sedge forms upright tufts and spreads slowly. Its bright yellow-green leaves give the clump much of its colour. Each leaf measures about 0.016–0.039 feet [0.005–0.012 metres] across. RHS gives a garden height of 3.3–4.9 feet [1–1.5 metres]. Clumps spread about 1.6–3.3 feet [0.5–1 metre] wide. Chicago reports a shorter height of 2 feet [0.61 metres]. These sources therefore show a fairly wide range of garden heights. RHS gives two to five years for plants to reach maturity.

The flower stems stay below the leaves. They carry bristly flower clusters shaped like fingers. These add a distinct form beside the long leaves. Chicago lists green flowers in May and June. RHS places flowering in June and July. Taken together, these records suggest a May-to-July flowering period. Local conditions may affect when the flowers appear. The leaves fade in autumn rather than staying green through winter.

Grow this sedge in soil that holds moisture well. RHS lists both clay and loam as suitable soils. It accepts acid, neutral, and alkaline conditions, including poor drainage. Full sun suits it, though RHS also allows light shade. It can grow at pond edges or in bog gardens. These uses suit its need for moist to wet ground. RHS rates it H6 for UK hardiness. Chicago lists USDA zones 3–7. RHS accepts both exposed and sheltered sites.

Use it as groundcover or in a wildlife garden. Its tufted form and flower clusters provide the main garden interest. RHS includes it among plants for low-maintenance planting. Cut back the leaves as they fade in autumn. Sow seed in autumn to raise new plants. Divide established clumps from mid-spring through early summer. Aphids may attack it, and rust can occur. RHS otherwise reports few disease problems. The supplied sources give no guidance on edible uses or toxicity.