Scotts Turf Builder Triple Action provides three benefits in one bag; it kills weeds, including dandelions and clover, prevents future weeds like crabgrass and other grassy weeds, all while feeding and strengthening your lawn. Prevents crabgrass for 4 months and feeds to build thick green lawns. Also prevents barnyardgrass, fall panicum, foxtail, annual bluegrass, broadleaf weeds, corn speedwell, prostrate spurge, knotweed, purslane, chickweed, henbit and oxalis. Scotts Turf Builder Triple Action is for use on the following grasses, including Kentucky Bluegrass, Perennial Ryegrass, Tall Fescue, Fine Fescue, Bermudagrass, Bahiagrass, Centipedegrass, and Zoyiagrass.