Magnesium Sulphate Magnesium sulphate is an important chemical compound. Its constituent elements are magnesium, sulphur and oxygen. It is denoted by the chemical formula MgSO4. Basically, it can be identified as a colourless, odourless, solid substance.This naturally occurring mineral is mostly found in hydrated state.This is because it tends to absorb water from atmosphere. One of its most widely available hydrated form is magnesium sulphate heptahydrate, also known as Epsom salt. It has 7 molecules of water of crystallization and is represented by MgSO4.7H2O . Magnesium Sulphate Heptahydrate can be applied dry to the soil, dissolved and used as a foliar spray or dissolved in hydroponic nutrient solutions. It can be incorporated into fertilizer blends.

Magnesium is a secondary micronutrient which is important in protein synthesis and enzyme processes, and it helps plants to absorb and use phosphorous and nitrogen Sulfur is a component of amino acids and proteins. It is important in plant metabolic functions and enzyme processes. A shortage of sulfur inhibits protein synthesis and decreases chlorophyll content in leaves.