This helps to kill existing weeds and feeds to thicken your lawn and crowd out future weeds. It controls over 50 listed lawn weeds, including clover, dandelion, plantain, morning-glory, chicory, evening primrose and purslane. Meant for use on Bahia grass, Bermudagrass, Bluegrass, Centipede grass, Fescue, Ryegrass and Zoysiagrass.