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.

Kills: Algae, Black medic, Broadleaf plantain, Bull thistle, Canada thistle, Common chickweed, Creeping buttercup, Creeping Charlie/Ground Ivy, Dandelion, Dollar spot, Dovefoot geranium, English Daisy, False dandelion, Heal-all, Lawn burweed, Liverworts, Lichen, Moss, Narrow-leaved plantain, Oxalis, Persian speedwell, Prostrate knotweed, Rust, Shepherd's purse, Silverweed cinquefoil, Slender speedwell, Snow mold, White clover, Wild chamomile