Managing Cypress Knees in the Landscape

Cypress knees (pneumatophores) form in wet soils for gas exchange. Cutting at ground level doesn't harm the tree—new ones will regrow. Never use herbicide on knees; it translocates to the tree.

Mow around them or remove periodically. They indicate high water table. If the tree is a valued golf ball shield, accept knees as part of the package.