In agriculture and gardening, magnesium sulfate is used to correct magnesium deficiency in soil (magnesium is an essential element in the chlorophyll molecule). It is most commonly applied to potted plants, or to magnesium-hungry crops, such as potatoes, roses, tomatoes, peppers and cannabis. The advantage of magnesium sulfate over other magnesium soil amendments (such as dolomitic lime) is its high solubility. NAME PHYSICAL AND CHEMICAL ANALYSIS MagnesiumSulfate Mainmin%MgSO4min%MgOmin%Mgmin%Fe max%Pbmax%As max% Moisture max% PH Size 98.00 48.316.15 9.815 0.0006 0.0006 0.0001 1 6---8 1mm-4mm