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How to Apply Epsom Salt to Tomato Plants

Boost your tomato growth with Epsom salt! Learn the best methods to apply it for lush, healthy plants and tasty tomatoes.

Like any other plant, tomato plants require a good amount of nutrients to grow healthy tomatoes. Finding the sweet spot for growing tomato plants may be a struggle. Slow growth, yellow leaves, and poor fruit production could dishearten you. 

We understand that. 

A garden with tomatoes and a shovel perfect for applying Epsom Salt to tomato plants

To grow healthy tomatoes, you need to ensure your soil has a good amount of Epsom salt. Epsom salt contains two major nutrients, sulfur and magnesium, which are responsible for better taste and greening of your plants. 

You’re in the right place if you wonder how and when to apply this salt. We will highlight these crucial points so you can see healthy and tasty tomatoes in your garden. 

Different Methods for Applying Epsom Salt to Tomato Plants 

Epsom salt is a popular gardening supplement with immense benefits (provided you add the right amount).

In this section, we will show you a step-by-step guide on how to apply Epsom salt to your tomato plants.


To start with, you need to create a solution first. The reason for creating this solution is that the roots can easily absorb the minerals when added to the roots. The steps are as follows:

  • Measure the Epsom salt. Ideally, you should use about one tablespoon of Epsom salt per foot of plant height.
  • For each tablespoon, you need one gallon of water. Mix both properly until the salt gets fully dissolved. 

Application Methods

Now that the solution is prepared, you must follow a few techniques. There are two kinds of application processes: 


  • Pour the Epsom salt solution directly onto the soil at the base of the plant. Do not pour the solution on the plant leaves, which might cause burning, especially during summer.
  • We suggest applying the solution at least twice a week to ensure a consistent supply of magnesium, which is very important throughout the plant’s growing phase.

Foliar Spray

  • This method requires you to mix two tablespoons of Epsom salt per gallon of water. The consistency of the salt is higher in this process as all of the magnesium will be absorbed through the leaves.
  • Apply to the leaves using a spray bottle or garden sprayer. The best time to do this is early morning or late afternoon. Try to avoid hours when the heat is high. Do this method monthly! 

Dosage to Avoid Overuse

Young plant growing in soil representing cautious application of nutrients to prevent overuse

When added in the right proportion, Epsom salt can yield excellent results, but if the dosage goes wrong, the whole idea of growing healthy tomato plants will go in vain. 

Here are a few things to avoid overuse. 

  • It’s important to perform a soil test to know the right dosage. This will tell you whether your soil is deficient in magnesium. 
  • If the test results show a deficiency, Epsom salt is a must. Look for signs like yellowing leaves between the veins or premature leaf fall. You may not need to add Epsom salt if these symptoms are absent.
  • Do not overapply the recommended dosage! Excess magnesium can lead to mineral imbalances in the soil and damage to the plant. 

So, the right amount of magnesium is essential for optimal growth and fruit production. Remember, moderation is key to avoiding overuse and damage.

When to Apply Epsom Salt to Tomato Plants 

The best time to apply Epsom salt is during the key stages of the plant’s life cycle. 

Early Growth Stage: During the growing season, sprinkle one tablespoon of salt around each plant when planting the seeds. This will give your plants the ultimate boost from day one, promoting healthy root development and early growth.

Flowering Stage: The flowering stage usually begins around early spring or midsummer. If you add Epsom salt at this stage, it will help boost the tomato’s qualities. The dosage would be one tablespoon of Epsom salt added to a gallon of water, and the solution would be used as a foliar spray.

Fruit Development Stage: At this phase, Epsom salt can prevent blossom-end rot and enhance the size and flavor of tomatoes. Try to add the solution at least twice a week during this stage.

Note: Use Epsom salt judiciously along with a balanced fertilizer program. Water the plants properly after applying Epsom salt. This will carry the nutrients to the roots.

Benefits of Epsom Salt for Tomato Plants 

Epsom salt, a combination of magnesium and sulfur, can give your tomato plants the right blend of nutrients essential for their growth. 

A person cutting tomatoes using scissors emphasizing the benefits of Epsom Salt for Tomato Plants

For tomato plants, Epsom salt has several benefits:

  • Greener Leaves: Epsom salt boosts chlorophyll production, an important component that gives plants a green color. It also helps absorb more energy from the sun.
  • Higher Nutrient Absorption: Another benefit of Epsom salt is that magnesium can help plants absorb other essential nutrients, including phosphorus and iron.
  • Strengthens Roots: Epsom salt, when used with other fertilizers, promotes stronger and healthier roots, enabling plants to better absorb water and other essential nutrients.
  • High Yields: The right amount of magnesium produces more flowers and fruit.
  • Protects Against Diseases: Sulfur is a very important nutrient that helps plants resist diseases.

We hope the benefits are clear now. If you’ve still not considered adding this solution to your tomato plant’s growing process, start now! 


Epsom salt plays a crucial role in the growth cycle of tomato plants. However, you must ensure that you follow the recommended dosage because, without the right dose, you will do more harm to your plants than good. 

So, follow the guidance and see how beautiful your garden looks! 

If you want the best quality fertilizers, reach out to Hans, as we deliver premium quality products that are ideal for your plants. 


Can I sprinkle Epsom salt directly on the soil?

You can sprinkle Epsom salt directly on the soil around tomato plants. Just remember the right dosage quantity—do not exceed that.

Will Epsom salt increase my tomato yield?

Yes, this solution can help tomato production if added in the right quantity. Epsom salt enables better nutrient absorption and promotes healthy roots. 

Is Epsom salt safe for all tomato varieties?

Yes, Epsom salt is suitable for all kinds of tomatoes. But add it only if your plant soil has any deficiencies.

Can I use Epsom salt even if my tomatoes show no deficiency?

You can skip this altogether if the soil test shows no signs of deficiency. So, perform the soil test before deciding. 

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