Using Eggshells in the Garden: 6 Brilliant Ways

The shell of a chicken egg is made up of approximately 96% calcium carbonate (CaCO3) crystals which are bound together by proteins. Common commercial methods of disposing of eggshells include the use of fertilizer or calcium source in animal feed, but the average consumer usually deposits them in the kitchen trash can. If you’re in this group, read on to discover six creative uses for eggshells that will benefit your garden.

6 Reasons to Use Your Eggshells in Your Garden

1. Fertilizer

Eggshells are a great way to add calcium to your compost. The shells decompose very quickly. Don’t even bother sterilizing or cleaning them. Simply throw your shells on your waste pile in a corner of the garden or in a barrel and turn it regularly.

Alternatively, you can incorporate crumbled eggshell directly into the bottom of your planting holes in spring.

During the winter months, spread your shells on the plot where you will plant in the spring. Once the ground warms, you can till your land to bury the shells in the ground. If you have unfavorable thoughts about having eggshells on the ground all winter, you can also clean them up and store them until planting season arrives.

Although calcium is considered a secondary nutrient for plants, your garden will definitely appreciate the added minerals, especially if you are growing tomatoes or peppers as these plants are most easily affected by calcium deficiency.

2. Deterrent

If you have problems with slugs and snails in your garden, try sprinkling coarsely crumbled eggshells around plants where these slimy little insects like to eat. The sharp edges of the shells deter snails and slugs from abrading the sensitive foot of any land mollusk that attempts to cross the barrier. Most snails and slugs will quickly leave your garden in search of easier pickings.

3. Seedling pots

Because eggshells biodegrade quickly when introduced to soil in the garden, they can also serve as perfect pots for starting your seeds.

Clean the inside of the shells (boiling water works well for this) and poke a small drainage hole in the bottom of each empty shell.

You can then place them in a cardboard egg carton, fill each shell with moist potting soil, and add your seeds.

Once the plants grow in their “pots”, you can transplant them with the eggshell directly into larger pots or into the garden.

4. Feed the birds

Before and after laying eggs, females need more calcium in their diet.

Sterilize your shells in the oven at 250°F/120°C for about ten minutes so that the shells are dry, but not brown inside.

Then crush your shells well and place them outside (in a feeder or even on the ground) during the spring and summer.

You can also mix crushed eggshells with a birdseed mixture.

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