In hot bins and garden composters, eggshells decompose more slowly compared to other organic materials, providing a steady release of calcium over time. This slow decomposition process contributes to the overall nutrient profile of the compost, making it more beneficial for garden soil. To maximise their effectiveness, it's best to rinse and crush the eggshells before adding them to your compost. This simple preparation helps speed up the breakdown process and ensures a more uniform distribution of nutrients throughout the compost. Whether you're using a wormery, hot bin, or garden composter, incorporating eggshells can significantly improve the quality of your compost and the health of your plants.