Epsom salts are a mineral compound made up of magnesium sulfate. They are commonly used in baths to help soothe sore muscles and reduce stress. When dissolved in warm water, Epsom salts can be absorbed through the skin, providing potential health benefits. In addition to their use in baths, Epsom salts are also popular in gardening. They can enhance plant growth by supplying magnesium, which is essential for photosynthesis. Many gardeners use Epsom salts to improve the health of their plants, particularly tomatoes and roses.