Pulverize Weed, Brush & Vine Killer uses the active ingredients Ammoniated soap of fatty acids to burn down weeds and Maleic hydrazide to prevent regrowth.  Kills the toughtest weeds, grasses and brush, including Poison Ivy, Poison Oak, Broom, Kudzu, Wild Blackberry and others ROOTS AND ALL! Non-staining.  Works quickly.  Use anytime during the year.