What To Do With Empty Walnut Shells

Empty walnut shells can be reused in all sorts of clever ways instead of tossing them in the trash.
 
If you’ve ever cracked a batch of walnuts for a recipe and stared at that pile of shells wondering what to do with empty walnut shells, you’re in the right place.
 
These tough little leftovers are surprisingly useful around the house, in the garden, and even in craft projects.
 
So before you throw them out, let’s look at the best things you can do with empty walnut shells.
 
I’ll walk you through practical, fun, and eco-friendly ideas so nothing goes to waste.
 
Let’s get into it.
 

Why You Should Reuse Empty Walnut Shells

Empty walnut shells are biodegradable, durable, and free, which makes them a great material to repurpose.
 
Instead of adding to landfill waste, you can give empty walnut shells a second life in ways that save you money and help the planet.
 
They don’t break down quickly, so they hold up well for lots of different uses.
 
Here’s why repurposing empty walnut shells is worth your time:
 

1. They’re Natural and Non-Toxic

Empty walnut shells come straight from nature, so there’s nothing synthetic about them.
 
That makes them safe to use around pets, plants, and kids in most cases.
 
You won’t have to worry about harsh chemicals leaching into your soil or your home.
 

2. They’re Free and Easy to Collect

Every time you snack on walnuts, you end up with a fresh supply of empty walnut shells.
 
You don’t need to buy anything special to start reusing them.
 
Just rinse them off and let them dry, and they’re ready to go.
 

3. They Break Down Slowly

Because empty walnut shells take a while to decompose, they work great as mulch or drainage material.
 
That slow breakdown means they keep doing their job for months.
 
So you get long-lasting value from something you’d normally throw away.
 

Creative Ways to Use Empty Walnut Shells

There are so many ways to put empty walnut shells to work that you’ll never look at them the same way again.
 
Whether you’re into gardening, crafting, or just want a tidier home, there’s an idea here for you.
 
Let’s go through some of the most popular options.
 

1. Use Them as Garden Mulch

Empty walnut shells make an excellent mulch for flower beds and garden paths.
 
Spread a layer of empty walnut shells around your plants to lock in moisture and keep weeds down.
 
Just keep in mind that walnut shells contain juglone, which can slow the growth of some plants.
 
Keep them away from sensitive veggies and use them around tougher shrubs instead.
 

2. Make Natural Drainage for Pots

Toss a handful of empty walnut shells at the bottom of your planters before adding soil.
 
This helps water drain away from the roots and prevents rot.
 
It’s a smart way to reuse empty walnut shells while keeping your potted plants healthy.
 

3. Create Eco-Friendly Fire Starters

Empty walnut shells burn well and make great kindling for fireplaces and fire pits.
 
Melt some wax over a batch of empty walnut shells, let them cool in a paper cup, and you’ve got homemade fire starters.
 
This is one of the most practical things to do with empty walnut shells during colder months.
 

4. Use Them for Craft Projects

If you’re the crafty type, empty walnut shells are a fun material to work with.
 
You can paint them, turn them into tiny ornaments, or use them in mosaic art.
 
Kids love decorating empty walnut shells and turning them into little boats or animals.
 

5. Scrub Tough Surfaces

Crushed empty walnut shells are used in some natural abrasives and scrubs.
 
You can grind them up and use them to gently scrub stubborn grime off tools or outdoor furniture.
 
Just be careful on delicate surfaces so you don’t scratch them.
 

6. Add Them to Compost

Empty walnut shells can go right into your compost bin.
 
They add carbon to the mix and help balance out the greens.
 
Since they break down slowly, crush them first to speed up the process.
 

7. Use Them as Decorative Vase Filler

A bowl or vase filled with empty walnut shells looks rustic and natural.
 
Layer them in a clear glass container and top with a candle or some dried flowers.
 
It’s a simple way to reuse empty walnut shells and add warmth to your decor.
 

8. Make a Natural Scouring Pad

Mix crushed empty walnut shells with a little coarse salt and oil to make a DIY scrub.
 
It works wonders on cast iron and heavy pots.
 
Just rinse well after using it so no bits are left behind.
 

9. Repel Pests in the Garden

Some gardeners spread empty walnut shells around plants to deter slugs and snails.
 
The rough texture makes it hard for them to crawl across.
 
It’s not a perfect fix, but it’s a natural way to reuse empty walnut shells.
 

Tips for Prepping Empty Walnut Shells

Before you put your empty walnut shells to use, a little prep goes a long way.
 
Here are a few quick tips to keep in mind.
 

1. Rinse and Dry Them

Give your empty walnut shells a good rinse to remove any leftover nut fragments.
 
Then let them dry completely so they don’t get moldy.
 

2. Sort by Size

Bigger pieces work well for mulch and decor, while smaller bits are great for scrubs.
 
Sorting your empty walnut shells makes them easier to use later.
 

3. Store Them Properly

Keep your dried empty walnut shells in a breathable bag or a bucket with a lid.
 
This keeps them clean and ready whenever you need them.
 

So, What to Do With Empty Walnut Shells?

What to do with empty walnut shells comes down to reusing them in ways that save money and cut waste.
 
From garden mulch and drainage to fire starters and crafts, empty walnut shells have plenty of life left after the nut is gone.
 
So next time you crack open a few walnuts, don’t toss the shells.
 
Rinse them, dry them, and put them to work with any of these ideas.
 
You’ll be surprised how handy empty walnut shells can be.