... Appearance: Granular Source:Ammonium Nitrate, Ammonium Phosphate, Monopotassium Phosphate, Potassium Sulfate,Magnesium Sulfate, Calcium Phosphate, Ferrous SulfateLongevity: 3Months-12Months(Customized. Product Description ... Potassium Sulfate, Magnesium Sulfate, Calcium Phosphate, Ferrous Sulfate ...