Great value for large areas, Roundup brand products help you triumph over the toughest weeds. Roundup Super Concentrate Weed & Grass Killer kills over 200 types of weeds (as listed). Concentrated for extra value, Roundup Super Concentrate Weed & Grass Killer is perfect for use around shrubs and trees, on patios, walkways, driveways, gravel areas and mulch, and along fences and foundations. It is also ideal for large projects, including lawn replacements or garden plot preparation. For best results, add 2.5 fl. oz. of the concentrate to 1 gal. of water. Use of a Roundup brand sprayer is recommended. Roundup Super Concentrate Weed & Grass Killer is rainproof in 30 min., and begins working on contact with visible results as fast as 2-4 days. This concentrated formula kills the root so weeds don't come back. Roundup Super Concentrate Weed & Grass Killer is absorbed by the weed's leaves or freshly cut woody stumps. Weeds die, roots and all - so they won't grow back. No root. No weed. No problem.