Zeifer is formulated with stabilised iron, chelated with EDDHA. It contains at least 6% iron and 4.8% ortho-ortho isomer. Zeifer 6% Fe improves iron availability to plants, The stability of the soil is very broad, pH 3 to pH 11, allowing full availability to plants. Zeifer 6% Fe is stabilised iron, chelated with EDDHA agent to improve iron availability to plants, especially those grown in calcareous, alkaline or acidic soils. Zeifer contains at least 6% iron and 4.8% ortho-ortho isomer that can prevent and correct iron chlorosis under all manner of conditions. Moreover, its stability in the soil is very broad, pH 3 to pH 11, allowing the availability to plants in mentioned conditions.