A breathable mesh bag allows air to circulate around the shells.
Over time, they become:
- Drier
- More brittle
- Easier to crush
- Easier to store
- Less likely to develop unpleasant odors
The method also creates a convenient collection point. Instead of crushing two or three shells every morning, you can accumulate a larger batch and process them all at once.
For the best results, rinse shells first and allow excess moisture to drain before adding them to the bag.
What Makes Eggshells Useful in the Garden?
The main component of eggshells is calcium carbonate.
Calcium is an essential plant nutrient involved in building strong cell walls and supporting normal plant development.
Plants obtain calcium through their roots from the soil.
However, there’s an important detail gardeners should understand:
Large eggshell pieces break down very slowly.
Simply placing half-shells around plants won’t provide an immediate calcium boost.
The smaller the particles, the more surface area soil organisms and natural acids can act upon.
