How to prune cyperus longus

Late winter to early spring before new growth begins. Cut dead or tatty stems right down to the base or crown using sharp shears. Divide congested clumps every 2–3 years in spring to maintain vigor and prevent spreading beyond its allotted space.

Annually in late winter; divide every 2–3 years. Cyperus longus (galingale) is a vigorous marginal plant that needs occasional tidying rather than heavy pruning. Cut back dead, yellowed, or frost-damaged stems to the base in late winter or early spring. Regularly removing old stems keeps the clump open, healthy, and prevents debris buildup in water.

Cut dead or tatty stems right down to the base or crown using sharp shears. Divide congested clumps every 2–3 years in spring to maintain vigor and prevent spreading beyond its allotted space.