Kill weeds down to the root without harming your lawn (when used as directed)! Ortho WeedClear Lawn Weed Killer Ready-To-Use1 with Trigger Sprayer controls and suppresses over 250 types of weeds, including all major broadleaf weeds (see label for list), dandelion, clover, oxalis, chickweed, and spurge, yet won’t damage your grass (when used as directed). The fast-acting formula is rainproof in 1 hour and delivers visible results after just one application. The liquid herbicide enters through the leaves and works through the plant to kill and control all the way down to the root. To use, install the Ortho Trigger Sprayer from the side of the bottle to easily reach and spot-treat weeds with your desired nozzle setting. Best to apply when weeds are young and actively growing. Recommended 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).