What Can You Do With Walnut Shells

Walnut shells can be reused in plenty of practical and surprising ways around your home and garden.
 
If you’ve ever cracked a batch of walnuts and stared at that pile of hard shells wondering what to do with them, you’re in the right place.
 
Instead of tossing them in the trash, you can turn walnut shells into everything from a gentle abrasive cleaner to a natural mulch for your plants.
 
In this post, we’ll look at some of the best uses for walnut shells, why they work so well, and how to prepare them before putting them to work.
 
Let’s dive in.
 

What Can You Do With Walnut Shells?

You can do a lot with walnut shells, and most of those uses cost you nothing but a little time.
 
Here are the top ways to put those leftover shells to good use.
 

1. Use Walnut Shells as a Natural Abrasive Cleaner

Crushed walnut shells make an excellent mild abrasive for cleaning tough surfaces.
 
Their gritty texture scrubs away grime without scratching metal or hard plastics the way sandpaper might.
 
You can grind walnut shells into a fine powder and sprinkle them onto a damp cloth to polish tarnished metals.
 
They also work well for cleaning engine parts, tools, and even gun casings in a tumbler.
 
This is one of the most popular industrial uses for walnut shells, and you can copy it right at home.
 

2. Spread Walnut Shells as Garden Mulch

Walnut shells make a durable, long-lasting mulch for garden beds and potted plants.
 
They break down slowly, so they hold their color and structure far longer than wood chips.
 
A layer of walnut shells around your plants helps retain moisture and suppress weeds.
 
Just be aware that black walnut shells contain juglone, which can harm some sensitive plants.
 
If you’re using shells from black walnuts, keep them away from tomatoes, peppers, and other juglone-sensitive crops.
 

3. Add Walnut Shells to Potting Mix for Drainage

Mixing crushed walnut shells into your potting soil improves drainage and aeration.
 
They create small air pockets that keep roots from sitting in soggy soil.
 
Over time, the shells slowly decompose and add a bit of organic matter to the mix.
 
This is a smart way to reuse walnut shells if you already have a pile sitting around after the holidays.
 

4. Use Walnut Shells for Craft Projects

Walnut shells are a favorite material for crafters and DIY enthusiasts.
 
You can dye them, paint them, and turn them into jewelry, ornaments, and decorative accents.
 
Crushed walnut shells also get used as filler in handmade soaps and exfoliating scrubs.
 
Their natural texture adds a rustic look that’s hard to fake with synthetic materials.
 
So if you enjoy crafting, save those shells instead of throwing them out.
 

More Clever Uses for Walnut Shells

Beyond cleaning and gardening, walnut shells have a few more tricks up their sleeve.
 
Here are some extra ways to get value out of every shell.
 

1. Use Walnut Shells as Fireplace Kindling

Dry walnut shells burn hot and long, making them great kindling for fireplaces and wood stoves.
 
They ignite easily and produce a steady flame that helps larger logs catch.
 
You can also soak them in melted wax to make homemade fire starters.
 
Just store them in a dry place so they don’t get moldy before you need them.
 

2. Turn Walnut Shells into Pet Bedding or Litter

Crushed walnut shells can be used as bedding for small animals and even as cat litter.
 
They absorb moisture well and control odors better than some traditional options.
 
Many commercial litter brands actually use walnut shells as their main ingredient.
 
If you have pets, this is a budget-friendly way to reuse walnut shells you’d otherwise discard.
 

3. Use Walnut Shells for Blasting and Polishing

Walnut shell grit is a popular media for sandblasting delicate surfaces.
 
It strips away paint, rust, and grime without damaging the material underneath.
 
People use it to restore old furniture, clean soft metals, and polish sensitive parts.
 
You can buy walnut shell blasting media, or if you’re handy, crush your own shells for small jobs.
 

How to Prepare Walnut Shells for Reuse

Before you put walnut shells to work, a little prep goes a long way.
 
Start by removing any leftover nut meat, since it can attract pests and cause mold.
 
Rinse the shells and let them dry completely in the sun or a warm spot.
 
If you need them crushed, wrap them in a towel and break them with a hammer or run them through a blender.
 
Store your prepared walnut shells in a dry container until you’re ready to use them.
 

So, What Can You Do With Walnut Shells?

Walnut shells can be reused in plenty of practical and surprising ways around your home and garden.
 
From natural abrasives and garden mulch to craft supplies and fire kindling, the options are nearly endless.
 
Instead of tossing them in the trash, you can turn walnut shells into something genuinely useful.
 
So next time you crack a batch of walnuts, don’t throw those shells away.
 
Save them, prep them, and put them to work.