If you are anything like I used to be you probably throw the shell away after you crack the egg, but there are many reasons why you should not do this! Eggshells have many different uses you would be silly to throw them away!
Eggshells are a great way to add calcium to your compost, they have a very high surface area to volume ratio, and they tend to decompose very quickly. You do not even have to worry about cleaning them or grinding them up just toss them on the pile or into a barrel and turn them over.
Nourishing face mask
Pulverize dried egg shells with a mortar and pestle, and then whisk the powder in with an egg white and use for a healthful, skin-tightening facial. Allow the mask to dry before you rinse it off.
Do you have problems with slugs or snails getting into your garden? Try sprinkling ground eggshells around your plants where the slimy little pests tend to eat. Most will quickly migrate from your garden in search of easier finds!
Treat Skin Irritations
Drop and eggshell into a small container of apple cider vinegar and let it soak for a few days. Dab this solution onto any minor skin irritation or onto itchy skin.
Seed Starter Pots
Eggs shells double as the perfect seed started pots. When you open your eggs to remove the contents, try to break just a small hole at the pointier end of the shell. Start by cleaning the inside of the eggshells and puncture a small drainage hole in the bottom of each empty shell. Place the shells back into the carton, fill each shell with potting soil, and then add your seeds.
Feed the Birds
Both before and after laying their eggs, mother birds need a lot of calcium in their diets. Sterilize the shells, crumble them up, and place them outside.
Do you have a problem with cats using your garden as a litter box? Crushed up egg shells will keep cats away too! Just scatter shells in the areas that the cats frequent, and after stepping on the shells a few times they will just move on!