2) Agriculturally, MgSO4 is an important fertilizer because magnesium is a major component of chlorophyll. It is most commonly used in potted plants and magnesium-hungry plants such as tomato, potato, rose, etc. MgSO4 has a much higher solubility compared to other fertilizers.
3) It can be used as an oral laxative.
4) MgSO4 (Epsom salt) can also be used as bath salts.