Harris 1 Gal. 20% Vinegar Weed Killer is a horticultural vinegar biopesticide. 20% Vinegar Weed Killer is organic and fast-acting. It provides non-selective control of herbaceous broadleaf weeds and weed grasses. Spray this product on unwanted weeds (vegetation) to the point of wetness. 32 oz. and 55 oz. Spray Bottles included for easy application. Value-Pack to treat multiple areas.