Safety-Iron 5% is specially formulated to be applied on lawns and turf in areas that present risks of staining concrete. When Safety-Iron is properly applied it will correct and prevent iron deficiencies in turf and lawns. A jar-test to check the compatibilities of new or unfamiliar combinations should be performed prior to mixing and application. The addition of a non-ionic surfactant will help reduce surface tension and improve uptake. Rate of use:Safety-Iron should be applied at regular intervals at 1 to 2 quarts per acre in a minimum of 50 gallons of water.