BioFarm Organic PE-FU-MI 3 in 1 Controls aphids, whiteflies and other insect pests, Fungicide Controls black spot, rust and powdery mildew, Miticide Controls Spider mite, Complex interacts of natural minerals decaying organic matters and microbes take place to form inorganic minerals in the soil. Roots absorb mineral nutrients as ions in soil water, but you do need additional mineral elements for perfect plant growth. There are actually 20 mineral elements necessary or beneficial for plant growth, Carbon C, hydrogen H and oxygen O are supplied by air and water. The 6 Macronutrients required are nitrogen N, phosphorus P, Potassium K, calcium Ca, magnesium Mg, And Sulfur S.