Zoysia Dethatching Guide

Thatch management is the MOST critical maintenance task for zoysia. Zoysia produces thatch faster than almost any other warm-season grass due to its dense stolons and rhizomes. When thatch exceeds 1/2 inch, water and fertilizer cannot reach roots, and disease pressure skyrockets. Dethatch annually in late spring to early summer when zoysia is actively growing and can recover. Use a BLADED dethatcher (like Sun Joe AJ801E) — NEVER use a prong-type dethatcher on runner-growing grasses, as it rips out stolons. Verticutting (vertical mowing) is the professional approach for severe thatch. After dethatching, apply fertilizer and water heavily to promote recovery. Expect 3-4 weeks for full recovery due to zoysia's slow growth rate.