What are fertilizers?
Think of fertilizers as plant food. Fertilizers are combination of the nutrients that plants must have to grow, in a form they can use. The primary nutrients in fertilizers are three essential elements: Nitrogen (N), Phosphorus (P) and Potassium (K), which are often combined into an NPK blend.

Secondary Nutrients
(Sulphur, Calcium and Magnesium) are needed in smaller amounts for normal plant growth. Micronutrients are also needed but in even smaller quantities. Micronutrients include Boron, Chlorine, Copper, Iron, Manganese, Molybdenum, Nickel and