University of Florida

Turf Thatch Control

Excessive watering or fertilizing and improper mowing can cause turfgrass to develop a thick, spongy mat called thatch. Thatch is an excellent habitat for insect pests and disease, makes mowing difficult, and reduces air and water flow in the lawn. To prevent and control thatch, fertilizer should be applied judiciously, and lawns should always be mowed at the recommended height and frequency. Only rarely do home lawns require thatch removal by mechanical means such as vertical mowing.

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