Bonide Burn Out Weed & Grass Killer kills all types of actively growing weeds and grasses. It is rainproof when dry, works at temperatures as low as 40 degrees F and does not translocate. Great for use around borders, driveways, sidewalks, around the base of mature trees, around buildings, fence lines, barns and pastures, school grounds, in greenhouses, and other areas where weed control is desired. Active ingredients: Citric acid, Clove oil.