Ortho WeedClear Lawn Weed Killer Concentrate kills many listed broadleaf weeds and it won't harm your lawn (when used as directed). With results in hours, it kills over 250 weeds down to the roots, including dandelion, clover, oxalis, chickweed, knotweed, plantain, henbit, and spurge. Ortho WeedClear Lawn Weed Killer Concentrate2 is for use on multiple lawn varieties, including Kentucky bluegrass, perennial ryegrass, fescues, common bermudagrass, hybrid bermudagrass, bahiagrass, bentgrass, buffalograss, centipedegrass, zoysiagrass, and St. Augustinegrass (except Floratam). Apply this herbicide in the spring, summer, and fall when weeds are young and actively growing. Spring and fall treatments under adequate soil moisture conditions are preferred to the summer treatments. This product is a concentrate. It cannot be applied directly out of its container. See the product label for the amount to use. Easily apply with an Ortho Dial N Spray or tank sprayer. Use Ortho WeedClear Lawn Weed Killer Concentrate2 to kill weeds to the roots!