sedge · design plant record

Carex oshimensis

Oshima sedge

A compact, arching ground layer for a moist edge. Cultivars differ in leaf colour; verify the named selection before buying.

Height at maturity

0.3–0.46 m (1–1.5 ft)

Spread at maturity

0.3–0.43 m (1–1.4 ft)

Light

Sun / Part shade

Moisture

Moist, draining soil / Wet-soil tolerance (check details)

Source-reported USDA zones

5–9 · verify subzone and cultivar

Principal seasonal role

Spring, Summer, Autumn

Fit it to the site

Rich, moisture-retentive soil. More sun requires reliable moisture.

Reject drought-prone sites without reliable care. Wet-soil tolerance is not permission to block drainage or ignore stagnant conditions.

Keep the care in the decision

Inspect moisture regularly in containers. Clumps enlarge slowly and may be divided in spring or autumn when needed.

Origin & safety checks

Japan. This is not a North American or UK native planting recommendation.

Toxicity not assessed here. Check exact cultivar and local invasive status.

Check current invasive restrictions with your local plant-health or extension authority. For pets, use the exact botanical name in a veterinary toxicity reference; for potential ingestion or exposure, get appropriate professional advice rather than relying on a design guide.