Pruning Overgrown Leyland Cypress: Risks and Realities

Leylands only have green needles on the outer shell. Cutting into brown wood = permanent bare spots. Light, frequent shearing maintains shape. Drastic height reduction (e.g., 30 ft → 15 ft) usually ruins form or kills the tree.

If hedge-shaped, block reduction may work. For tree-form, consider removal and replacement with a manageable species. "Little and often" is the only safe approach.