Eggshells are a great source of slow release calcium to help maintain the optimal pH level in your worm bin and helps with worm reproduction. The grit also aids in worm digestion! 🥚✅
To prepare eggshells for your worm bin, follow these steps:
RINSE the eggshells: After using the eggs, rinse any remaining egg residue off the shells with cold water.
DRY the eggshells: You can either dry them out in the sun, laying them out in a single layer on a wire mesh/screen to allow for good air flow or you can put them in an old egg carton. You can also place them on a baking sheet in an oven set at 300 degrees for at least 5 minutes.
CRUSH the eggshells: Once the eggshells are completely dry, crush them into small pieces. You can use a mortar and pestle, rolling pin, or put them in a plastic bag and crush them with your hands. You can also grind them up in a blender or grinder. The pieces should be no larger than 1/4 inch in size, ideally they should be ground up to a powder.
- ADD the crushed/powdered eggshells to the worm bin: Mix the crushed eggshells gently into the worm bin, you can do this at feeding time. We recommend adding up to 1/2 cup of eggshells to your bin during a one month period for small to mid-sized worm bins.
Remember not to add excessive amounts of eggshells at once; moderation is key to maintaining a balanced environment for your worms.