How To Fertilize Soil With Eggshells

Eggs are delicious and nutritious. Most people throw away the shells, which is the best part—for plants at least. Instead of throwing away this resource, consider using it to improve the soil in your garden, as eggshells are a good source of calcium for your plants, and can help make a great fertilizer. You can easily add minerals and nutrients to soil using crushed eggshells or eggshell tea. You can also use eggshells as seed starters to ensure that your seedlings get off to a good start.

  1. Save your egg shells. When you use eggs in a meal or for a recipe, save the shells. Crack open your raw eggs, rinse the shells with warm water, and let them dry in a sunny pot. Run your finger around the inside of the shell when washing it to remove any residue, but try to preserve the membrane. Most of the nutrients are in this.

For best results, plan on using 4 to 5 eggs for each plant you want to fertilize.

  1. Crush the eggshells or grind them into a fine powder. You can crush them into flakes using your hands or a food processor. You can also grind them into a powder using a mortar and pestle or a coffee grinder instead. It is possible to use whole eggshells in your soil, but they will decompose much faster if they are crushed or ground into powder.

To make the crushing process easier, bake the eggshells at 350 degrees until the start to lightly brown before grinding.

  1. Add a few teaspoons of powdered eggshell into the hole if you are planting a new flower, herb, or vegetable. Once you have some eggshells in the hole, put the plant inside, and pat the soil around it. Putting eggshells directly into the hole with the plant ensures that the plant will get the nutrients from the decomposing eggshells.
  2. Add crushed eggshells around the base of your plant. You do not need to cover the eggshells with soil. As they decompose, they will leach calcium and other nutrients into the soil. This will help your plants grow into strong, healthy plants.


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