Captain Jack'sâ„¢ DeadWeed Brew provides fast-acting, non-selective control for broadleaf weeds, grass, algae and moss. Starts killing within hours. The ready-to-use formula makes it easy to apply to visible weeds in vegetable & flower gardens, landscaped areas, lawns, around buildings and fences, and more. Also works great on bark, mulch, gravel, and around the base of trees. Rainfast in three hours, and safe for people and pets to enter the treated area as soon as the spray dries. Carefully read and use according to label directions. Approved for organic gardening. Ready-to-use with trigger spray. CA Label.