Epsom salt is a naturally occurring mineral composed of hydrated magnesium sulfate. In the early 1600s, it was discovered in an underground spring in the town of Epsom, in England. It has since been used to cure a variety of human, animal, and plant ailments. It has 10% magnesium and 13% sulfur in its chemical composition. Many plants require these nutrients because of the roles they play in growth and development.
Epsom salt improves flower blossoming and the color of a plant's leaves. It can even aid in the growth of bushier plants. Epsom salt is composed of hydrated magnesium sulfate (magnesium and sulfur), which is essential for plant health. This type of salt can increase the cell uptake of key minerals, including nitrogen, phosphorus, and sulfur. Having the increased cell uptake, plants will show thicker foliage and larger vegetables.
To boost nutrient intake of plants, mix two tablespoons of Epsom salts with one gallon of water and spray onto leaves, rather than onto the roots, for maximum absorption. Alternately, add the salts directly to the soil: one teaspoon of salts per each foot of plant height.