Description Derived from Iron, Captain Jack’s™ Lawnweed Brew offers selective control of weeds, disease, moss, algae, and lichens in lawns. The active ingredient is derived from iron, which occurs in nature. Kills many common weeds like dandelion, clover, moss, narrow-leaved plantain, chickweed, and thistle. Works quickly, as dying weeds will be seen within hours of application. Specifically formulated with Iron (Fe) to control broadleaf weeds People and pets can enter the treated area when spray dries Controls broadleaf weeds, disease, moss, & algae, but won’t harm lawn grass Kills weeds down to the root Works in cool weather (down to 50°F)
