Improve your compost with this eggshell trick


Composting is an excellent way to reduce waste and create nutrient-rich soil for your garden. By breaking down organic materials, such as food scraps and yard waste, composting produces a valuable resource that can improve soil structure, retain moisture, and provide essential nutrients for plants. While there are many ways to enhance your composting process, one simple trick involves using eggshells. In this article, we will explore how eggshells can improve your compost and provide tips on incorporating them effectively.

The Benefits of Eggshells in Compost

Eggshells are a rich source of calcium carbonate, which is an essential nutrient for plants. By adding eggshells to your compost, you can increase the calcium content, promoting healthy plant growth and preventing nutrient deficiencies. Calcium is particularly important for plants that require a higher pH level, such as tomatoes, peppers, and eggplants.

In addition to calcium, eggshells also contain small amounts of other essential nutrients like magnesium, potassium, and phosphorus. These nutrients contribute to overall plant health and can help improve the quality of your compost.

Furthermore, eggshells can help balance the pH level of your compost. While most organic materials tend to be slightly acidic, eggshells have an alkaline nature. Incorporating eggshells into your compost can help neutralize the acidity and create a more balanced environment for beneficial microorganisms to thrive.

Preparing Eggshells for Composting

Before adding eggshells to your compost, it is essential to prepare them properly. Here are a few steps to follow:

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1. Rinse the eggshells: After using eggs, rinse the shells under warm water to remove any remaining egg white or yolk. This step helps prevent odors and pests in your compost pile.

2. Dry the eggshells: Allow the rinsed eggshells to air dry completely. You can place them on a tray or a drying rack and let them sit for a few days until they are no longer moist.

3. Crush the eggshells: Once dry, crush the eggshells into small pieces. You can use a mortar and pestle, a rolling pin, or even your hands to break them down. Crushing the shells increases their surface area, making it easier for them to decompose in the compost pile.

Incorporating Eggshells into Your Compost

Now that you have prepared your eggshells, it’s time to add them to your compost. Here are a few tips on incorporating eggshells effectively:

1. Mix them with other organic materials: To ensure even distribution of nutrients, mix the crushed eggshells with other organic materials in your compost pile. This can include kitchen scraps, yard waste, and dry leaves. Aim for a balanced mix of carbon-rich (browns) and nitrogen-rich (greens) materials for optimal composting.

2. Layer the eggshells: As you build your compost pile, layer the crushed eggshells throughout the organic materials. This helps prevent clumping and allows for better airflow and decomposition.

3. Monitor moisture levels: Eggshells can absorb moisture, so it’s essential to monitor the moisture levels in your compost pile. Aim for a damp but not soggy environment. If your compost becomes too wet, add dry materials like leaves or shredded newspaper to balance the moisture.

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4. Turn the compost regularly: Turning your compost pile regularly helps aerate it and speeds up the decomposition process. As you turn the pile, ensure that the eggshells are mixed well with the other materials.

Other Uses for Eggshells

Apart from composting, eggshells have several other practical uses in and around the household. Here are a few ideas:

1. Pest deterrent: Crushed eggshells can act as a natural deterrent for pests like slugs and snails. Sprinkle the crushed shells around the base of vulnerable plants to create a barrier that pests find difficult to cross.

2. Seedling starter pots: Empty eggshells can serve as biodegradable pots for starting seedlings. Fill the shells with potting soil, sow the seeds, and once the seedlings are ready, transplant them directly into the ground, shell and all. The eggshell will decompose and provide additional nutrients to the growing plants.

3. Calcium supplement for pets: Crushed eggshells can be added to your pet’s food as a calcium supplement. This is particularly beneficial for animals that require extra calcium, such as birds, reptiles, and small mammals.


Incorporating eggshells into your compost is a simple yet effective way to enhance its nutrient content and improve plant health. By following the steps mentioned above, you can prepare and add eggshells to your compost pile successfully. Additionally, eggshells have various other uses around the household, making them a versatile and sustainable resource. So, the next time you crack an egg, remember to save the shells and give your compost a boost with this eggshell trick.

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