Avenger Organic Weed Killer is a Ready to Use spray that is Eco-Friendly, yet deadly to weeds Avenger Weed Killer is a non-selective, post-emergence herbicide that quickly and effectively kills weeds, grasses and broadleaves without causing harm to the environment. The active ingredient d-limonene (citrus oil) naturally strips away the waxy plant cuticle, causing it to dehydrate and die. University and independent testing results prove that Avenger Weed Killer is as effective, but faster acting when compared against leading synthetic herbicides. When tested against non-organic 'natural' herbicides that contain vinegar (acetic acid), citric acid, clove oil or fatty acids (soap), it is more effective with quicker results. Great for use in and around: Gardens, Lawns, Shrubs, Flower Beds, Driveways, Sidewalk, Patios, Borders, Outside Walls, Mulch Beds, Gravel Beds, Mature Trees and Ornamentals, Greenhouses, Fencerows, Foundations, Buildings, Golf Courses, Athletic Fields, Parks and Recreation Areas, Bike and Hiking Trails, Kennels and Animal Enclosures.