Kills broadleaf weeds, not lawns. See results in hours. Iron (Fe) is naturally derived. Does not contain 2,4-D. People and pets can re-enter treated areas when spray is dry. Kills most common weeds like clover, common chickweed, dandelion, creeping Charlie/ground ivy, thistle and more. Even works in cool weather (50 deg F). Primarily applied in the spring and fall when temperatures are between 50 deg F and 85 deg F. Controls weeds, disease, moss, algae and lichen. Safe for use on warm and cool season grasses. Not for use on bent grass. Re-seed treated area after only one day.