Spectracide Weed & Grass Killer Concentrate2 is a nonselective weed and grass killer that kills weeds and grasses down to the root. Our easy-to-use, fast-acting insect, lawn disease and weed control solutions help you tame lawn and landscape invaders with incredible pest-punishing power. Plant new flowers, trees and shrubs in the treated area after just 1 day. For best results, apply during warm, sunny weather when the temperature is over 60 degrees. Protect desirable plants with a piece of plastic or cardboard - if desirable plants are accidentally sprayed, wash with water immediately. Do not mow, cut or otherwise disturb treated vegetation for at least 7 days following application. Do not use on or around edible feed or food crops.