Fast acting iron supplement. Features a proprietary, patent-pending chelation technology to improve iron uptake in plants. Chelation is a process that helps transform nutrients into soluble forms that are easily taken up by plants and beneficial soil microbes. Unique chelating approach is proven to increase iron uptake by 65% more than grass treated with a competing iron supplement at 45 days after treatment. And with double the iron, youll achieve a deeper green lawn that lasts.