1 3 gal Weed Grass Killer RTU Liquid The fast and powerful root kill action of BioAdvanced Weed and Grass Killer begins working after 1 hour Only 1 application is needed to kill weeds dead so they don t come back Not all weed killers are the same Make the switch Features . Root kill action. Visible results in 1 hour. Rainproof in 10 minutes. Kills only what you spray Specifications . OMRI Certified No. Organic No. Rain Proof Yes. Container Size 1 3 gal. Application Season Multi Season. Pre Post Emergent Post Emergent. Primary Active Ingredient Glufosinate. Application Location Garden. Type of Weed Multi Weed. Targeted Weed Weed and Grass. Country of Origin USA. Weight 12 1 lbs