Iron is a vital nutrient required by plants to form chlorophyll. Chlorophyll is what gives plants their green color. Promotes vigorous growth and dark green color of turf, flowers, shrubs, trees. Sulfate formula designed to be immediately available to plants in need. Liquid Iron can be applied as either a foliar spray or soil drench. Carefully read directions before use.Promotes vigorous growth and dark green turfCorrects and prevents plant yellowingCan be used as a foliar spray or drenchNutrients available immediately to plantsThis product is compatible with most pesticides and fertilizers, with the exception of amine formulations and high phosphate fertilizers