The fast and powerful root kill action of BioAdvanced Weed & Grass Killer Super Concentrate begins working after 3 hours. Our multi-purpose formula provides maximum control to kill even the toughest brush. Only one application is needed to kill weeds dead so they don't come back. Whether treating spots or landscapes, Weed & Grass Killer works the first time, every time. Proven results. Peace of mind. Make the switch. | BioAdvanced Weed and Grass Killer Super Concentrate | Size 32 oz