Add Yahoo as a preferred source to see more of our stories on Google. Gardener with basket of egg shells spreading crushed shells around tomato plant - VH-studio/Shutterstock A quality eggshell ...

There’s a key to making egg shells work in the garden. Eggshells provide calcium and improve soil when properly cleaned, crushed, and composted. Benefits are long-term; eggshells decompose slowly and ...

A quality eggshell contains about 2.2 grams of calcium carbonate, the compound that gives them their strength. Eggshells also contain lesser amounts of magnesium, phosphorus, iron, copper, and ...