Collect eggshells and rinse them thoroughly to remove any egg residue.
Boil the Eggshells:

Place the cleaned eggshells in a saucepan and cover them with water.
Bring the water to a boil and let it simmer for about 10 minutes. This helps to sterilize the shells and extract calcium and other nutrients into the water.
Cool and Strain:

After boiling, allow the water and eggshells to cool completely.
Strain the liquid into a container, separating the shells from the water.
Crush the Eggshells:

Crush the boiled eggshells into small pieces or grind them into a fine powder using a mortar and pestle or a coffee grinder.
Using Boiled Eggshell Water:

Watering Plants:
Use the cooled eggshell water to water your plants directly. This method provides a gentle calcium boost.
Using Crushed Eggshells:

Soil Amendment:
Mix the crushed or powdered eggshells into the soil around your plants. This helps to gradually release calcium and improve soil structure.
Pest Barrier:
Sprinkle crushed eggshells around the base of plants to deter pests like slugs and snails.
Additional Tips:
Consistency:

Regularly add boiled eggshell water or crushed eggshells to your garden to maintain calcium levels in the soil.
Combine with Compost:

Incorporate eggshells into your compost pile to enhance the overall nutrient content of your compost.
Use on Houseplants:

Boiled eggshell water can also be used to water houseplants, providing them with an extra nutrient boost.
Conclusion:
Boiling eggshells in a saucepan is a simple and effective way to create a natural fertilizer and pest deterrent for your garden. This method not only recycles kitchen waste but also saves money on store-bought fertilizers and pest control products. By incorporating boiled eggshell water and crushed eggshells into your gardening routine, you can enhance soil health and promote stronger, healthier plants.