Can Epsom salt fix Magnesium deficiencies? Can you Fight Diseases by the Foliar Application of Epsom Salt? Does Epsom Salt help Increase Nutrient Absorption and Yields of garden Plants? Will it help me Grow Tastier Tomatoes and Sweeter Fruit?
Dr. Linda Chalker-Scotts paper on Epsom Salt http://puyallup.wsu.edu/~Linda%20Chalker-Scott/Horticultural%20Myths_files/Myths/magazine%20pdfs/EpsomSalts.pdf If your into Organic Gardening and a part of one of the many online communities you have no doubt come across claims surrounding the use of Epsom salt in the garden.
As you know I have been putting garden practices and claims to the test to see which ones are supported by science and which ones are not.
For example the science behind the use of coffee grounds in the garden is supported whereas the use of cold coffee to fertilize and lower the pH around your blueberries is not.
Today we are going to see if Epsum salt really good for your garden?
Epsom salt is made of magnesium sulfate (MgSO4) when dissolved in water it releases Magnesium and Sulphur.
Magnesium and Sulphur are both essential elements for plant growth and production. Magnesium playing a key role in chlorophyll and sulphur plays a key role in amino acids. 
It would seem logical that more Magnesium and Sulphur in the soil would help your plants and support these claims right?
Lets talk about a few of these claims and for the purpose of discussion focus on Magnesium. Magnesium Deficiencies