Spectracide Weed & Grass Killer is pre-mixed and ready to use for spot treatment of weeds and grasses. Use it on and around patios, walkways and flower beds. This product kills weeds and grasses at the root as listed. 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. 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 seven days following application. Do not use on or around edible feed or food crops. Guaranteed results or your money back ? see product label for details.