Bonide Captain Jack’s Deadweed Brew Ready-to-UseOur herbicide provides fast acting control of weeds, grass, mosses, & algae within hours. Captain Jack's Deadweed Brew is great for use on visible weeds within vegetable & flower gardens, landscaped areas, & lawns. It can also be used on visible weeds around & on buildings, sidewalks, fences, bark mulch, driveways, patios, & gravel. Approved for organic gardening. Fast acting grass and weed killer Approved for organic gardening Use in gardens