Selective control weed killer. Derived from iron, safe to use on lawns. Kills weeds down to the root. Kills many common weeds including dandelion, clover, moss, narrow-leaved plantain, chickweed, broadleaf weeds, algae, lichens,and thistle. See results in hours, no unpleasant odor. Re-seed 1 day after application. People and pet safe after spray is completely dry. Glyphosate-free.