If your plants have a magnesium deficiency, they will indicate this deficiency with slow growth and yellow foliage. Magnesium is a naturally occurring compound found in the soil; however, sandy soils may be deficient in magnesium. Epsom salt can help improve the magnesium content of soil because it is magnesium sulfate. When you water your plants with Epsom salt water, you can improve the health of your plants by making the roots and stems stronger and producing more vibrant blossoms and foliage.
Place 2 tbsp. of Epsom salt into the bottom of the bucket and add 1 gallon of cool water to the bucket.
Stir the contents well and pour it into the watering can.
Water plants with the Epsom salt water. The frequency you choose to apply the Epsom salt depends upon the magnesium deficiency you observe in your plants. Provide Epsom salt water every time you water for plants suffering extreme magnesium deficiency. Less extreme deficiencies may benefit from Epsom salt water once or twice per month.