6. Deter Garden Pests
While Epsom salt won’t dehydrate slugs and snails like table salt (sodium chloride), it can still be used to deter pests. Hydrated magnesium sulfate crystals are sharp and when sprinkled around plants, they can scratch and irritate the bodies and feet of unwanted critters in much the same way as diatomaceous earth. (Keep in mind that Epsom salt dissolves very easily in water, thus any amount of rain will likely wash them away.)
7. Grow Sweeter Fruit
The production of fruiting bodies is the most taxing process in the life cycle of a plant. Apply Epsom salt to fruit and nut trees, bushes, and vines using the same methods and quantities stated above to boost chlorophyll levels inside the plant cells. Increased energy means more sugar, allowing the plant to produce higher yields of sweeter, healthier fruit.
8. Tastier Tomatoes
Tomato vines are one of a handful of common garden residents whose fruit to plant size ratio is heavier than average, leading to an even higher likelihood of magnesium-deficiency. For this reason, tomatoes should be fed Epsom salt twice as often as other plants. Also, because tomato vines are prone to calcium-deficiency (blossom end rot), the majority of tomato fertilizers contain calcium which will compete with magnesium for root absorption. Therefore, foliar feeding is the more efficient method for delivering magnesium to these plants. Water tomato vines with dissolved Epsom salt – 2 tablespoons per gallon of water, every 2 weeks.