How to Use Epsom Salts as a Fertilizer

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Epsom salts, also known as magnesium sulfate, can be used as a fertilizer to promote plant growth. To mix Epsom salts as a fertilizer, follow these steps:

1. Determine the correct dosage: The recommended dosage is typically 1-2 tablespoons of Epsom salts per gallon of water for outdoor plants, and half that amount for indoor plants.

2. Dissolve the Epsom salts: Fill a watering can or spray bottle with the appropriate amount of water, then add the Epsom salts. Stir or shake well until the salts are completely dissolved.

3. Apply to plants: Water the plants with the Epsom salt solution, making sure to saturate the soil around the roots. For potted plants, apply the solution until it drains out of the bottom of the pot.

4. Repeat as needed: Depending on the specific needs of your plants, you can repeat this process every 2-4 weeks during the growing season.

Remember to always follow the instructions on the packaging and adjust the dosage according to the specific needs of your plants.


Epsom salts, scientifically known as magnesium sulfate, provide a cost-effective and simple way to improve garden soil. These salts contain essential nutrients like magnesium and sulfur, which are vital for plant growth. While sulfur deficiency is rare due to the use of fertilizers and acid rain, magnesium deficiency is common. Epsom salts can be mixed with water and used as a soil drench or foliar spray to add these elements to the soil and enhance plant health. Gardeners can easily find Epsom salts at drugstores. However, the mixing and application of Epsom salts depend on specific needs, and the results may vary.


How to Use Epsom Salts as a Fertilizer
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Correcting Magnesium Deficiencies

Magnesium deficiency is often observed in soils, particularly in sandy and light areas. This deficiency can also occur due to excessive rainfall or irrigation, which leaches magnesium from the soil. The addition of Epsom salts to the soil has proven to be effective and beneficial in correcting magnesium deficiencies.

Identifying a magnesium deficiency is the first step in correcting it. Plants with magnesium deficiency exhibit yellowing of the areas between veins, known as interveinal chlorosis. These plants may also have stunted growth and curled leaves. Epsom salts can rectify such deficiencies. To do so, mix 1/2 to 1 ounce of Epsom salts with 3 gallons of water and apply it to the soil.

Using Epsom Salts for Rose Growth

Epsom salts are commonly used to enhance rose growth. Supporters claim that they promote greener leaves and more blooms. To boost the blossoms, dissolve 1/2 cup of Epsom salts in enough water and use the mixture to water the roses in early spring. For ongoing fertilization, spray a mixture of 1 tablespoon of Epsom salts and 1 gallon of water onto the roses every two weeks during the growing season. However, avoid spraying on sunny days to prevent burning of the plants.

Using Epsom Salts for Other Plants

Epsom salts can also enhance the growth of other plants such as peppers, tomatoes, lawns, and roses. Mix 1 tablespoon of Epsom salts with a gallon of water and spray the plants with it when they are transplanted, when they first flower, and when they set fruit. For larger plants, apply one tablespoon of Epsom salts for every foot of plant height.

For greener lawns, Epsom salts can be applied. Dissolve 1 tablespoon of the crystals in a gallon of water and use the mixture to wet the entire lawn. Follow up with a thorough watering using just water to ensure that the salts penetrate the soil. Alternatively, use a spreader and apply about 3 pounds of Epsom salts per 1,250-square-foot area.

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