Arizona’s Best KeRex Super Iron Chelate is a combination of several iron products designed to assist in correction of chlorotic plants growing in Western alkaline soils. KeRex has chelating qualities that prevent metallic iron from combining with other compounds in the soil and allows it to remain free and available to the plant. This “free iron” results in a recognizable deep green leaf color. It is usually observable within twenty-one days or so after application during the growing season. KeRex may also increase plant vigor, assist in generating more buds and flowers and stimulate roots to make more efficient use of local plant food sources.