Magnesium is the central atom in chlorophyll and is thus essential in photosynthesis. Magnesium also influences other pigments and physiological processes. This makes it an indispensable element in the development of the plant.
Magnesium is directly absorbable by the plant and its effect is therefore quickly visible. It can be used as a fertilizer in case of magnesium deficiency and as a supplementary substance to stimulate growth and flowering.