With a little creativity and time, you can turn what might otherwise end up in the trash into useful, practical items—all while reducing your environmental footprint. Here are some simple and resourceful ways to reuse egg cartons and shells.
Reusing Egg Shells for Birds and Soil

Eggshells are an excellent source of calcium carbonate, making them incredibly useful for both wildlife and your garden. Here’s how you can reuse eggshells effectively:
Support Local Birds: During spring, birds need extra calcium for egg production. Chicken eggshells* provide a perfect supplement. Add crushed eggshells to bird feed or spread them on a tray or the ground. Even if some shells aren’t eaten, they’ll still enrich the soil as they break down.
Amend Acidic Soil: Eggshells act as a natural soil conditioner, similar to agricultural lime. Calcium carbonate is the prime component in both bird egg shells and agricultural lime. This makes egg shells perfect for improving acidic soils on a budget.
Don’t skip the washing and drying out of the eggshells before putting them outside—the slimy membrane inside is highly attractive to rodents and other pests due to its high nutritional content, specifically its protein and collagen, which also are part of what makes them difficult to break down on their own.

Instructions:
- Collect about half a carton’s worth of eggshells and rinse thoroughly until they’re no longer slimy
- Spread the clean shells on a parchment-lined cookie sheet
- Preheat the oven to 250°F and bake the shells for 10-15 minutes until dry but not browned
- Crush the dried shells
- Lift the corners of the parchment to funnel the crushed shells into a container for easy distribution.
- Add them to bird feeders, trays, or broadcast them over the ground to benefit your garden or yard birds
- Make more egg-shell crumbs as often as the birds gobble them up. Or as often as your soil needs amending.
- Wish your bird friends a happy nesting season!
DIY Fire Starters from Egg Cartons

Fire starters are great for backyard fires, camping trips or as gifts for friends who love having their own bonfires. Instead of buying fire starters, you can make your own using materials likely already in your home or waste bin. First gather your materials:
Materials:
- Paper-pulp egg cartons (no plastic or foam)
- Dryer lint (about a handful)
- 2 cookie sheets lined with parchment paper
- A heat-proof metal or glass jar (if you’re using spent candles, the container they’re already in will work fine)
- 8-12 oz of melted candle wax (soy or beeswax or leftover candle wax from spent candles)
Instructions:
- Melt the Wax: Place your candle wax into a heat-proof jar or place spent candle jars directly onto a parchment-lined cookie sheet. Preheat the oven to 250°F (300°F for beeswax due to its higher melting point). Let the wax melt in the oven, which may take up to 30 minutes.
- Prepare the Egg Carton: On a separate parchment-lined cookie sheet, place the bottom half of the egg carton. Stuff each compartment with dryer lint until full and flush with the top of the compartment.
- Pour the Wax: Once the wax has melted, carefully pour it over the lint-filled compartments, saturating the lint without overflowing. Use a back and forth motion as you pour. Be cautious, as wax is hard to clean from surfaces.
- Let Dry: Allow the wax to cool and harden overnight.
- Use Your Fire Starters: Break off one or two compartments when ready to use for an outside campfire. Light an edge and place under kindling to start your fire**.
- For an extra boost, add torn-up paper towels (used but not soiled) or bits of the egg carton lid to the lint before pouring the wax. And don’t worry if the parchment sticks to the fire-starters, it’s perfectly flammable as well.
**Fire starters should always be used outdoors and with caution.
Why It Works
By reusing egg cartons and shells, you’re turning potential waste into practical, cost-effective cool stuff. Not only do these methods save you money, but they also support wildlife and improve your soil. So, the next time you’re about to toss an egg carton or shell, think of these creative reuses!
Ready to get started composting with Shadyside Worms? Sign up here. Or email us directly.
Ready to receive more Shadyside Worms soil products with your current subscription? Sign up for our product and service packages here.
*There’s a bunch of uses for egg shells as well as the egg shell membranes.
Bird nerd info: https://www.audubon.org/news/give-nesting-birds-calcium-boost-saving-your-leftover-eggshells
Egg carton info: https://saudereggs.com/egg-carton-materials/
Egg shell wikipedia: https://en.wikipedia.org/wiki/Eggshell
Soil conditioner wikipedia: https://en.wikipedia.org/wiki/Soil_conditioner
More egg shell uses! https://vitalfarms.com/5-ways-to-reuse-eggshells/

































