Starxbast Weed Killer (ready-to-spray) is a non-selective herbicide that kills any grass or weeds that are one and around the home, making weed control easy - Unique formula works to kill problem weeds - Kills toughest weeds and grasses - Absorbs through the leaf and stem only so killing power will not spread to non-target plants through soil - Convenient, no mix formula (ready-to-spray) - Rainproof in 10 mins - Visible results in 3 hours When to Apply Apply when weeds are actively growing. Spray when air is calm to prevent drift to desirable plants Where to Use Can be used in vegetable gardens, patios, walkways, driveways, gravel and mulch beds, around shrubs or trees, in flower beds, and along fences Application Frequency Apply every 2-3 weeks (14-21 days)