Epsom salt, Magnesium Sulphate, MgSO4.7H2O (Mg 9.6 % & Sulphur 12 %), is a secondary major nutrient for plant growth and development. 
Magnesium deficiency is apparent by interveinal chlorosis with leaf turning upwards and becoming brittle
Magnesium is important secondary nutrient for plant growth and development especially multi seeds fruity vegetables such as tomatoes, chili, capsicum, cucumbers, melon etc. for flavor, test and color of fruits
Promotes chlorophyll production there by lush green leaves, flower blooming and fruit development in plants. 
Improve seed germination and relive re-potting stress (transplant shock) 
Direction for use:
House Plants - ½ to 1 tablespoon monthly. Roses - 1 table spoon per feet of plant monthly.  Foliar spray - 5 gm (one teaspoon) per liter of water