Gardener with basket of egg shells spreading crushed shells around tomato plant - VH-studio/Shutterstock A quality eggshell contains about 2.2 grams of calcium carbonate, the compound that gives them ...

Eggshells have many garden uses. They can help nourish the soil, change the pH, and kill pathogens. However, they're not proven to help with this garden task.

Your garbage just might be your garden’s treasure. Here’s what you need to know about using eggshells to help your plants grow. Finely crush the eggshells to release calcium faster—perfect for ...

To develop strong resistance to diseases like blossom end rot and stronger cell walls, tomato plants require calcium. In keeping with the principles of organic gardening, eggshells—which are rich in ...