Ortho® WeedClearTM Lawn Weed Killer Concentrate 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. The concentrated formula can be easily applied with an Ortho Dial N Spray or tank sprayer. For use on grasses including Bermudagrass Buffalograss Fescues Kentucky Bluegrass Ryegrass and Zoysiagrass. Use Ortho® WeedClearTM Lawn Weed Killer to kill weeds to the roots! Mix 2.5 fl. oz. with 1 gallon of water to cover up to 400 sq. ft. Each bottle creates 12.8 gallons of ready to use weed killer that can cover up to 5 000 sq. ft.