Now for one of my favorite non-bath uses: the garden. Tomatoes and peppers are often described as magnesium-hungry plants, and a modest Epsom salt feed may help if your soil is actually low in magnesium. Magnesium matters because it plays a role in chlorophyll production, which supports healthy green growth.
Dissolve 1 tablespoon of Epsom salt in 1 gallon of water and apply it around the base of tomato or pepper plants about once a month during active growth. Use the soil drench on already-moist soil, not bone-dry pots. More