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To recycle eggshells effectively, follow these steps:
- Boil the eggshells: If you haven’t already boiled the shells while preparing boiled eggs, place them in a pot of water and bring it to a boil. After boiling for ten minutes, remove the shells from the water.
- Ground or chop the shells: Once boiled, grind or chop the eggshells until they form a fine powder. This powder can be easily mixed with plant substrate.
- Apply to plant soil: Add the eggshell powder to the soil of your plants, ensuring thorough mixing. This step provides a steady release of nutrients to the plants.
For a more concentrated calcium dose, you can boil the eggshells in water for an additional hour. This extended process further reduces the shells into a finer powder.

By incorporating this homemade eggshell fertilizer into your gardening routine, you’ll observe lusher plant growth, and it can act as a deterrent against pests. Considering the expenses associated with commercial fertilizers and pesticides, boiling eggshells emerges as a cost-effective solution that benefits both your plants and your wallet.