If you haven't already boiled the shells to cook a soft-boiled egg, do so in a saucepan. Once boiled, the shells can be crushed or chopped into a fine powder.
This powder can be added to the soil of plants, mixing it well with the substrate. If you want a more concentrated dose of calcium, you can put boiled eggshells in a pan with water and boil them for another hour.
This process will further reduce the shell to a finer powder. Once the powder is ready, it can be added to the soil around your plants. Thanks to this new fertilizer, your plants will become more lush, and pests will stay away. Considering the cost of fertilizers tailored to different plant types and all the pesticides, boiling eggshells is undoubtedly a money-saving remedy.
