It's Easy to Improve Your Garden By Using Eggshells

Eggshells make good fertilizer, compost, and pest deterrents

If you eat a lot of eggs, you naturally end up with an abundance of eggshells. Instead of throwing them in the trash or down the disposal, you can make good use of them in your garden. Rinse them out and allow them to dry, then crush or powder them, and use them for a variety of purposes. They become a no-cost fertilizer, pest deterrent, cat deterrent, pots for seeds, or chicken feed supplement. And eggshells make a great addition to the compost pile. 

1
Fertilizer

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Photo © Erin Huffstetler

Prevent blossom end rot by fertilizing your tomatoes, peppers, and eggplants with eggshells. The plants absorb the calcium from the eggshells and grow mostly problem-free. For maximum effect, sprinkle eggshells into each hole before planting. Then sprinkle additional shells around the base of your plants every two weeks. More

2
Garden Pest Deterrent

Garden snail.
Auscape / Getty Images

Slugs, snails, and cutworms can do serious damage to your garden. You can protect your plants from these pests by spreading crushed eggshells around your garden. The jagged edges will do a number on the soft bodies of these pests if they try to cross them.

3
Cat Detterent

Outdoor domestic cat
Getty Images

If a neighborhood cat thinks your garden is his own personal litter box, you need to engage in a little dissuasion. Cats have an aversion to eggshells, and they will keep any wandering kitties out of your garden beds. Just scatter eggshells in the areas that the cats frequent, and after stepping on those shells a few times, they'll decide some other garden is preferable to yours.

4
Compost

Composting - How to Start a Compost Pile
Photo: © Marie Iannotti (2008) licensed to About.com, Inc.

Eggshells are the perfect candidate for composting. They break down quickly, and they add a nice dose of calcium to the soil. Just make sure the shells are dry before you add them to the pile so you don't attract any unwanted critters. If you have a worm compost bin, adding eggshells is a great way to maintain the proper pH level. More

5
Seed Pots

You don't need to spend money on small pots to start seeds in the spring. Just fill half an eggshell with a tiny bit of potting soil, drop a seed in, and sprinkle with water. If you save your egg cartons, you'll have the perfect container to hold your seed starts until they're ready to plant. More

6
Chicken Feed Supplement

Chickens as pest control in the garden.
Photo by Angela England

If you're one of the many homeowners who keep chickens in their backyard, you want to keep your hens healthy. Hens need plenty of calcium to lay thick-shelled eggs. Add crushed or powdered eggshells to their regular feed to help them get the nutrients that they need. Just don't feed them whole shells; that might make them develop a taste for the ones in their nesting boxes.