Non-selective weed and grass killer that kills weeds and grasses down to the root. Use it on and around patios, walkways, and flower beds. This formula is rainproof in 15 minutes - rainfall or watering after 15 minutes will not wash away effectiveness. Kills down to the root and delivers visible results in as fast as 3 hours. Plant new flowers, trees, and shrubs in the treated area after just 1 day. When used as directed, it works the first time, every time. For best results, apply in spring or fall, when daytime temperatures are at least 60 degrees Fahrenheit. Triple-powered weed and grass killing formula - Diquat, Fluazifop-p-butyl and Dicamba.