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  • Naomi Stephens | Permaculture Designer

Epsom Salts on Plants: How to Use, Pest Control, Cure Yellowing Leaves, Magnesium Deficiency

Updated: Jun 12


If you are a plant lover, then you may have heard about using Epsom salts on plants. Epsom salt is made of magnesium and sulfur, two minerals that are essential for plant growth.


Epsom salt is a naturally-occurring mineral compound. It has a long history of use in gardening and agriculture, dating back to the early 1600s. Epsom salt can be beneficial for plants in several ways.


In this blog post, we will discuss the benefits of using Epsom salts on plants and how to do it properly. We will also talk about the potential risks associated with using Epsom salts and how to avoid them.


In this post:

  1. Epsom Salts provide essential nutrients

  2. Epsom Salts improve drainage and aeration

  3. Epsom Salts deter pests and diseases

  4. National Garden Association Study Proves Epsom Salts Benefits

  5. How is Epsom salt necessary for plants to make chlorophyll?

  6. How using Epsom Salts encourages seed germination

  7. What plants can you put Epsom salt on?

  8. Can too much Epsom salt hurt plants?

  9. What does Epsom salt do for potted plants?

  10. How to test your soil for a magnesium or sulfur deficiency

  11. How to prevent magnesium deficiency with Epsom Salt

  12. How to use Epsom Salt as Pest control

  13. How to use Epsom Salts on plants

  14. Can I just sprinkle Epsom salt in my garden?

  15. When should I put Epsom salt in my garden?

  16. How often should I use Epsom salt in my garden?

  17. What flowers can you put Epsom salt on?





Epsom Salts provide essential nutrients


Epsom salts provide essential nutrients that are necessary for plant growth, including magnesium and sulfur. Epsom salt is a magnesium sulfate compound that has a long history of use in gardening. Magnesium is an essential nutrient for plants, helping them to create chlorophyll and produce strong cell walls. Sulfates are also necessary for plant growth, as they help to improve soil structure and promote root development.


Epsom Salts improve drainage and aeration


Epsom salts are a popular gardening product that can be used to improve the drainage and aeration of compacted soils. The salts are rich in magnesium sulfate, which helps to break up clay particles and improve water infiltration. In addition, the magnesium sulfate helps to promote root growth and encourages the uptake of other essential nutrients. Roots receive the oxygen they need to stay healthy and this prevents waterlogging which can lead to root rot. As a result, plants grown in soil amended with Epsom salts often have better drainage and aeration, leading to healthier growth.


Epsom Salts deter pests and diseases


Gardeners have begun to harness the power of epsom salts to deter pests and diseases. When applied to the soil, epsom salts help to correct nutrient imbalances and encourage strong, healthy plant growth. In addition, the magnesium in epsom salts can help to prevent powdery mildew and other fungal diseases.


When sprayed on the leaves of plants, Epsom salts act as a physical barrier against aphids, whiteflies, and other troublesome pests. And because Epsom salts are non-toxic, they can be used safely around children and pets. Unlike Neem oil, which is a popular organic fertilizer, Epsom salt is not toxic to bees and so you do not need to time your spraying to the mornings or evenings in order to avoid harming bees or any other beneficial insect.


National Garden Association Study Proves Epsom Salts Benefits





The benefit of using Epsom Salts as a fertilizer rank higher than using commercial fertilizers alone and this has been proven thanks to tests run by the National Gardening Association which found that roses treated with Epsom salts were bigger, bushier, and more robust. They also found that peppers grown with Epsom salt grew bigger.


How is Epsom salt necessary for plants to make chlorophyll?


Chlorophyll is a green pigment that is found in the leaves of plants. It is essential for the process of photosynthesis, which helps plants to convert sunlight into energy.

Epsom salt is a source of magnesium, which is necessary for the synthesis of chlorophyll. Magnesium is involved in many important biochemical reactions in plants, including the production of ATP (adenosine triphosphate), the molecule that stores energy in cells.

Without magnesium, plants would be unable to produce chlorophyll and would not be able to perform photosynthesis. In addition, magnesium helps to strengthen plant cell walls, which can help to prevent disease and looting by pests. For these reasons, epsom salt is an essential ingredient for healthy plant growth.


How using Epsom Salts encourages seed germination





Epsom salts are a natural source of magnesium, which is essential for plant growth. Magnesium helps plants to produce chlorophyll and activates enzymes that are necessary for seed germination. In addition, Epsom salts can help to loosen compacted soil, making it easier for roots to spread. For best results, mix one teaspoon of Epsom salt with one gallon of water and apply the solution to the soil around your plants. This simple step can encourage faster seed germination and help your plants to thrive.


What plants can you put Epsom salt on?


Many gardeners swear by the benefits of Epsom salt, and there are a number of plants that can benefit from its use for example:


  • - roses

  • - peppers

  • - tomatoes

  • - potatoes

  • - eggplants

  • - cabbage

  • - squash

  • - beans


Can too much Epsom salt hurt plants?


Epsom salt is made up of magnesium sulfate, it can help plants to grow stronger and more resilient. However, like anything else, too much Epsom salt can be harmful.


When applied in excess, Epsom salt can actually damage plant leaves, causing them to yellow and wilt. In extreme cases, it can even kill plants. So, how much Epsom salt should you use?


As a general rule of thumb, 1 tablespoon of Epsom salt per gallon of water is all that is needed. Be sure to Dissolve the salt in water before applying it to your plants, and always follow the manufacturer's instructions. With a little care, you can safely use Epsom salt to give your plants a boost - just don't overdo it!


What does Epsom salt do for potted plants?


One of the main problems with potted plants is drainage. Epsom Salts will help prevent this by adding essential minerals to the soil and loosening it up so that water can drain more easily.


Epsom salt is a type of mineral that can be beneficial for potted plants. It provides nutrients that plants need, including magnesium and sulfate. These minerals can help to encourage healthy growth and improve the appearance of foliage.


How to test your soil for a magnesium or sulfur deficiency

If your plants are looking sickly, it may be a sign that they are lacking in magnesium or sulfur. The best way to test your soil is to take a sample to your local nursery or cooperative extension office.


You could also use a soil testing kit to determine the levels of magnesium or sulfur in your plant.


How to prevent magnesium deficiency with Epsom Salt


The usual sign of magnesium deficiency in house plants is chlorosis. Chlorosis is a condition that results in the yellowing of leaves due to a magnesium deficiency. While chlorosis can be caused by several factors, such as high pH levels or poor drainage, it is most often caused by a lack of magnesium in the soil.


Magnesium is an essential element for photosynthesis, and without it, plants are unable to produce chlorophyll. As a result, their leaves turn yellow as seen in the picture below.




In order to combat chlorosis, you can add epsom salt as instructed below.

How to use Epsom Salts for pest control


Epsom salt is toxic to many common garden pests, such as slugs and snails, it can be used as an effective (and inexpensive) way to keep them at bay. Wondering how to use Epsom Salts for pest control? It's actually quite simple. All you need to do is mix together:


- ½ teaspoon of salt

- ¼ teaspoon of dish soap

- One quart of water


Then, just pour the mixture into a spray bottle and spritz it on any pests.


How to use Epsom Salts on plants


Epsom salt can be used in two ways: as a foliar spray, or as a root drench.


Foliar spray


When using it as a foliar spray, dissolve 1 tablespoon of salt in 1 gallon of water and apply it to the leaves of the plant.


Root drench


For a root drench, mix 1 cup of Epsom salt in 1 gallon of water and pour it around the base of the plant.

Be sure to only use Epsom salt on plants that are struggling to grow, as too much magnesium can be harmful. With proper care, Epsom salt can help your plants to thrive.




Can I just sprinkle Epsom salt in my garden?





Yes, you can sprinkle Epsom salt in your garden, but it's important to water it well afterwards.


This will help ensure that the salt doesn't damage your plants.


When should I put Epsom salt in my garden?



Epsom salt can be added to your garden at any time, but it's especially beneficial when you're planting new seeds or transplants.


How often should I use Epsom salt in my garden?


You can use Epsom salt as often as you like, but for best results, experts recommend using it every two weeks.


What flowers can you put Epsom salt on?


Epsom salt can be used on any type of flower, but it's especially beneficial for roses. As seen in the National Gardening Association Study conducted on roses which showed that adding Epsom salt to the soil around roses can lead to more blooms.


 

With this, if you are an avid grower of house plants, you should find the use of Epsom salts very beneficial.


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