Our herbicide provides fast-acting control of weeds, grass, mosses and algae within hours. Captain Jack's deadweed brew is great for use on visible weeds within vegetable and flower gardens, landscaped areas and lawns. It can also be used on visible weeds around and on buildings, sidewalks, fences, bark mulch, driveways, patios and gravel. Approved and suitable for all of your organic gardening needs. Product mixes with water and should be applied as a spray using a standard hand-held or backpack sprayer.