Ortho WeedClear Lawn Weed Killer 24 ounce, ready to use trigger spray bottle kills all types of weeds without harming your lawn (when used as directed). The formula is rainproof in 1 hour and is fast-acting – you’ll see results in just one application. It kills over 200 weeds down to the roots, including dandelion, chickweed, clover, crabgrass, and foxtail. Works on Southern and Northern lawns. For use on grasses, including Bermudagrass, Buffalograss, Fescues, Kentucky Bluegrass, Ryegrass, and Zoysiagrass.