Spectracide Weed & Grass Killer is a non-selective weed and grass killer that kills weeds and grasses. It’s formulated for spot treatment of weeds and grasses on patios, walkways and driveways; around flowers, shrubs and trees; and along fences and foundations. This formula is rainproof in 15 minutes — rainfall or watering after 15 minutes won’t wash away effectiveness. Spectracide Weed & Grass Killer kills down to the root and delivers visible results as fast as 3 hours. Plant new flowers, trees and shrubs in the treated area after just 1 day. For best results, apply this ready-to-use spray during warm, sunny weather when the temperature is over 60 degrees. Completely cover the leaves of the target vegetation. 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.