Works fast. Starts working immediately. Kills weeds completely down to the root. For use along fences, in cracks of walks, paved areas, landscaped areas, driveways, patios, ornamental and flower beds. Active Ingredients: 0.18 percent Diquat Dibromide, 0.06 percent Fluazifop-p-butyl and 0.04 percent Dicamba, dimethylamine salt.