Growbuddy Epsom salt (magnesium sulfate) in the garden. It contains magnesium one of what vegetable garden growers call the "major minor" elements. It helps speed up plant growth, increase a plants nutrient uptake, deter pests, increase flavor of fruit and veggies, plus increase the output of vegetation and improve overall plant health. Epsom Salt contains secondary nutrients. Magnesium(mg) 9.6% Min & Sulphur(s) 12.0% Min. Magnesium constituent of chlorophyll mg gives green color to leaves. it play important role in photosynthesis and also regulates the uptake of other nutrients by the plant.it promotes the formation of oils and fats.