Ortho WeedClear, 32 OZ, Ready To Spray, Lawn Weed Killer North, Kills Over 250 Listed Weeds Including Dollarweed, Dandelion, Clover & Chickweed. Won't Harm Lawn Grasses When Used As Directed. Apply When Broadleaf Weeds Are Young & Actively Growing For Best Results, Apply When Rain Is Not Predicted For 24 Hours After Application, Results In Hours.