Ortho GroundClear, Gallon, Ready To Use, Weed & Grass Killer, Kills All Types Of Weeds & Grasses. Absorb On Contact & Starts Working Immediately, For Use On Patios, Walkways, Driveways, Landscape Beds, Vegetable Gardens & Under Trees, Apply Any Time Of Year When Weeds Are Small & Actively Growing, Apply Directly To The Weeds. Rain Proof In 2 Hours, See Results In 15 Minutes, Omri Listed For Organic Gardening, Trigger.