• When Epsom salt is used in conjunction with regular garden fertilizer, the effects on a plant's growth can be impressive. A dose of Epsom salt added to mineral-depleted soil is an inexpensive way to replenish some of those minerals.

    Chemical Makeup

    Two components of Epsom salt, magnesium and sulfur in the form of magnesium sulfate, are both important minerals required for a plant's development and general health. Epsom salt does not contain sodium.

    Benefits of Magnesium Sulphate

    Magnesium allows plants to absorb critically needed nitrogen and phosphorus from the soil, encourages chlorophyll production and promotes seed germination. Without magnesium, green leaves begin to yellow and drop. Sulfur enhances the effectiveness of nutrients present in most commercial fertilizers.

    Knowing When to Add Epsom Salt

    It's fairly safe to use Epsom salt in any garden, but sandy or alkaline garden soils particularly need the boost of magnesium sulfate in Epsom salt. Plants with weak stems or yellowing leaves can indicate a lack of sulfur in the soil.

    Amount Needed

    The Epsom Salt Council recommends sprinkling a cup of Epsom salt per 100 square feet of garden soil before planting. Roses profit from a bare-root soak in a solution of Epsom salt and water prior to planting. Most bags or cartons of Epsom salt have dosing recommendations for garden plants.

    Pest Deterrent

    Spraying a solution of Epsom salt and water on plants and lawns can also deter slugs, voles and other garden pests.


    Epsom Salt Council: Epsom Salt--Why It Works

    Cool Greenery: Why Use Epsom Salt

    Worms and Flowers: Epsom Salts as a Plant Supplement

    More Information: Epsom Salt--A Back To Basics Garden Home Remedy

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