"These Fertilizer Tablets can be used for a variety of different plants. Their chemical analysis is: Nitrogen: 20% (7% Water Soluble Organic Nitrogen and 13% Water Insoluble Nitrogen), Available Phosphoric Acid: 10%, Soluble Potash: 5%, Combines Sulfur: 2% Iron 2.5%, Manganese: 2%, Zinc: 0.18%, Magnesium: 2.25%."