Magnesium sulphate

About Magnesium sulphate

Magnesium sulfate is a chemical compound consisting of the elements magnesium (Mg), sulfur (S) and oxygen (O). The heptahydrate is also called epsomite or epsom salt, and the monohydrate is called kieserite. Magnesium sulphate or epsomite or kieserite are the common English equivalents often used in international commercial language. Magnesium sulfate monohydrate is a white powder or granules. Magnesium sulfate occurs naturally as a mineral, but can also be produced synthetically.

shutterstock 1422987353 magnesiumsulfat

Fertiliser industry

Magnesium sulfate is a widely used fertilizer that serves as an important secondary nutrient for plants. It consists of the elements magnesium (Mg) and sulfur (S), which are essential for the healthy growth and development of plants. Magnesium is an important nutrient for plant growth, while sulfur is involved in the formation of proteins and enzymes.

As a secondary nutrient, magnesium contributes to the formation of chlorophyll, the green leaf pigment responsible for photosynthesis. Photosynthesis allows plants to convert sunlight and carbon dioxide into sugars in order to grow. Magnesium helps plants use solar energy efficiently, promoting optimal photosynthesis.

A deficiency of magnesium can lead to a variety of problems. One of the most obvious consequences is the yellowing of the leaves because not enough chlorophyll can be produced. This condition is called chlorosis. In addition, a magnesium deficiency can stunt plant growth, reduce flowering and lower resistance to disease and pests.

Adding magnesium sulfate as a fertilizer can help correct these problems. It provides plants with sufficient magnesium and sulfur to ensure healthy growth. Magnesium sulfate is usually applied to the soil in the form of granules or as a salt, or administered as an aqueous solution through the roots. It can also be used as a foliar fertilizer by spraying a solution on the leaves.

Magnesium sulfate has the advantage that it can be quickly absorbed by plants due to its good solubility. The dissolved magnesium and sulfate ions can be easily absorbed through the roots and transported to the various parts of the plant. Thus, a deficiency can be quickly corrected and the growth of the plants normalized.

Magnesium sulfate is particularly suitable for crops that have an increased need for magnesium, such as tomatoes, potatoes, fruit trees or ornamental plants. It can generally be used on magnesium-poor soils or on plants suffering from a recognizable magnesium deficiency.

It is important to apply magnesium sulfate in appropriate amounts and at the right time. Therefore, it is advisable to perform a soil analysis before application to determine the nutrient requirements.

Ferro Duo will be happy to help you find the optimal product for your application.


FD Kieserite 27-20


Magnosiet K17

Other applications:

Horticulture: Epsom salt can be used in horticulture to increase the magnesium content of the soil, which is especially important for plants that need an adequate magnesium supply, such as tomatoes, potatoes and roses.

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