Roundup Super Concentrate Weed & Grass Killer is a great value for large areas. Weeds usually yellow and wilt as fast as 2-4 days. For use around flowers, shrubs, and trees; on patios, walkways, driveways, gravel areas, and mulch beds; along fences and foundations; in large areas for lawn replacements or garden plot preparation. Easily apply with a Roundup brand tank sprayer.