Are your container plants suffering from blossom end rot? Don’t worry, you can easily prevent and treat this issue with a homemade eggshell spray.

By adding calcium-rich eggshells to your soil or compost, you can ensure that your plants have the necessary nutrients to thrive.

In this article, we will guide you through the process of creating an eggshell and vinegar solution, which releases water-soluble calcium that can be readily absorbed by your plant’s root system.

Say goodbye to blossom end rot and hello to healthy, flourishing plants!

Benefits of eggshell spray

The eggshell and vinegar solution is a cost-effective and natural way to manage blossom end rot, providing numerous benefits for your plants.

  1. Increases calcium levels: The solution helps address calcium deficiency, which is a common cause of blossom end rot. The water-soluble calcium released from the eggshells quickly becomes available for the plant’s root system.
  2. Prevents and treats blossom end rot: Regular application of the solution can help prevent and manage blossom end rot in container plants. By providing sufficient calcium, it ensures healthy fruit development and reduces the likelihood of this issue occurring.
  3. Eco-friendly and affordable: The eggshell and vinegar solution is a sustainable and cost-effective alternative to chemical treatments. It utilizes natural materials that are readily available and does not harm the environment or contaminate the soil.

Nutrients provided by eggshell spray

To ensure the healthy growth of your plants, you’ll find that eggshell spray provides essential nutrients. When you make eggshell spray, you are providing your plants with the following nutrients:

  1. Calcium: Eggshells are rich in calcium, which is crucial for plant growth and development. Calcium helps strengthen cell walls, preventing diseases and promoting overall plant health.
  2. Magnesium: Eggshells also contain magnesium, an important nutrient for chlorophyll production. Chlorophyll is necessary for photosynthesis, the process by which plants convert sunlight into energy.
  3. Trace minerals: In addition to calcium and magnesium, eggshells contain trace minerals like potassium and phosphorus. These minerals play a vital role in plant metabolism, root development, and nutrient uptake.

Eggshell spray recipe


  • Crushed and Dried Eggshells
  • White Vinegar
  • Water


  1. Prepare the Eggshells:
    • Collect and clean eggshells.
    • Place them in an oven at 175-200 degrees Fahrenheit for about 30 minutes to dry them out and eliminate any potential contaminants. Be careful not to burn them.
  2. Crush the Eggshells:
    • After the eggshells have cooled, crush them into a fine powder. You can use a coffee grinder or a mortar and pestle for this purpose. The finer the powder, the more effective it will be.
  3. Create the Eggshell and Vinegar Mixture:
    • In a container, combine equal parts of the crushed eggshells and white vinegar. For example, if you use 1 tablespoon of crushed eggshells, add 1 tablespoon of white vinegar.
    • Mix the two ingredients together. You will notice some foaming and a reaction between the vinegar and calcium in the eggshells. This is what makes the calcium more readily available to your plants.
  4. Let It Sit:
    • Allow the mixture to sit for approximately 30 minutes. During this time, the calcium in the eggshells will react with the vinegar, creating water-soluble calcium.
  5. Dilute the Mixture:
    • After 30 minutes, you can dilute the mixture further by adding it to a larger container of water. The dilution ratio can vary, but a general guideline is to use one tablespoon of the eggshell and vinegar mixture for every gallon of water. Adjust the ratio as needed.
  6. Apply to Your Plants:
    • Use the diluted eggshell spray to water your container tomato plants and other vegetables once or twice a month. Ensure that the solution is evenly distributed to your plants.
  7. Consistent Watering:
    • Remember to maintain consistent and even watering for your container plants to prevent blossom end rot due to drought stress.

Further reading

I’ve created a list of several types of homemade organic sprays that provide nutrients or protect plants from pests and diseases. Check the post below for this list.

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