Ground into powder, eggshells release calcium slowly into the soil, which supports stronger cell walls and sturdier stems — especially helpful for tomatoes, peppers, and other plants prone to calcium-related issues like blossom end rot.
- Rinse shells clean of any egg residue.
- Boil them for about 10 minutes in water (a splash of vinegar helps) to kill off any bacteria.
- Once dry, grind them into a fine powder with a blender or mortar and pestle.
- Sprinkle the powder around the base of plants or mix it into potting soil.
A natural barrier against slugs and snails
Coarsely crushed shells scattered around plant stems create a sharp, uneven surface that slugs and snails avoid crawling over — a chemical-free way to protect seedlings.
