Breaks down harmful thatch while promoting lusher, hardier lawns!Although some thatch in your lawn is beneficial, too much can cause fungal diseases to grow and spread. All-natural Thatch Control is a highly concentrated patented microbe that breaks down excessive lignin and cellulose found in thatch and converts into beneficial nutrients for the lawn. It germinates and grows on harmful thatch while drawing upon it as a food source. Lawns treated with Thatch Control will be hardier, lusher, more vigorous and better protected from harmful turf diseases. 2 oz packet (treats 5000 sq ft of lawn).