Ortho GroundClear Weed & Grass Killer SUPER Concentrate Flexi 2-5 oz. packages. Ortho GroundClear Weed & Grass Killer SUPER Concentrate is pre-dosed in a mini flexible 5 oz pouch that is poured directly into a bottle or tank sprayer and mixed with 1/2 gallon of water and used as an RTU. No Mess. Eliminating the need to manually measure out chemicals. Pour, shake and spray weeds. Kills even the toughest weeds and grass. Quick kill formula starts working immediately. Kills to the root.