Roundup Advanced Ready-to-Use is an effective way to control unwanted weeds and grasses. This convenient format is perfect for spot control of weeds in and around gardens, and on walkways, patios, driveways, and around structures. Saturate unwanted plants and youll see visible effects after spraying due to a rapid burndown acetic acid formula. Actively growing, susceptible broadleaf and grassy weeds are controlled in 1 to 2 days. This spray controls unwanted grasses, annual weeds like common ragweed, and the top growth of perennial weeds such as plantain, plus it wont leave harmful residues in the soil. Primary Ingredient: Acetic Acid...62.5 g/L.