Spectracide Weed & Grass Killer2, AccuShot Sprayer, 1.33-Gallon KILLS WEEDS AND GRASSES: Use on driveways and walkways, and around fences, trees, flower beds, shrubs and other areas in your yard. FAST-ACTING FORMULA: Visible results as fast as 3 hours  replant new flowers, trees and shrubs the same weekend. RAINFAST: Rainfall or watering 15 minutes after application will not wash away effectiveness. KILLS THE ROOT: Completely cover the leaves of the target vegetation. MONEY-BACK GUARANTEE: Guaranteed results or your money back  see product label for details.