Ortho WEEDCLEAR? lawn weed killer ready-to-use1 refill kills many types of broadleaf weeds and it won't harm your lawn. With results in hours, it kills over 250 weeds down to the roots, including dandelion, clover, oxalis, chickweed, knotweed, plantain, henbit & spurge. This refill bottle can be used with an Ortho WEEDCLEAR? comfort wand. For use on multiple lawn varieties, including Kentucky bluegrass, perennial ryegrass, fescues, common Bermuda grass, hybrid Bermuda grass, Bahia grass, bent grass, buffalo grass, centipede grass, zoysiagrass and St. Augustine grass (except Floratam). Use Ortho WEEDCLEAR? lawn weed killer to kill weeds to the roots.