Decimate Weed & Grass Killer from ferti-lome is a non-selective herbicide alternative to glyphosate. It kills weeds and grass plus some woody plants. It kills most everything - so be sure to protect desireable plants when spraying! Works in 24 to 72 hours, and performs best when temperatures are over 85 degrees. Rainfast in ½ hour to 4 hours. What's best - the sprayed area may be reseeded or replanted as soon as the spray has dried! 16 oz. concentrate bottle.