Ortho? WeedClear? Lawn Weed Killer Ready-to-Spray kills all types of weeds (as listed) 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. Application is easy: simply connect the garden hose to the attached sprayer. For use on grasses including Bermudagrass Buffalograss Fescues Kentucky Bluegrass Ryegrass and Zoysiagrass. Use Ortho? WeedClear? Lawn Weed Killer to kill weeds to the roots!