Products / Fertilizer / Nutrition Secondary Macronutrients
Calcium (C)
Calcium a part of cell walls. It also regulates transport of other nutrients into the plant. Calcium deficiency results in stunting. (Calcium (Ca) deficiency is a common disorder of plants on acidic soils, but more usually caused by unavailability rather than a shortage. This may be due to water shortages, which slow the transportation of calcium to the plant, or can be caused by excessive usage of potassium or nitrogen fertilisers.)

Magnesium (Mg)
Magnesium is an important part of chlorophyll, a critical plant pigment important in photosynthesis. It is important in the production of ATP through its role as an enzyme cofactor. There are many other biological roles for magnesium. Magnesium deficiency can result in interveinal chlorosis.

Sulphur (S)
Sulfur is another important component of amino acids and proteins, and is therefore important in plant growth.