LAWNWEED BREW GAL RTU W/WAND CAPTAIN JACKSDerived from Iron, Captain Jacks 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. Kills broadleaf weeds, disease, moss and algae in lawns. Derived from iron (fe) which