When you crack open a walnut, it’s easy to toss the shells into the bin without a second thought. But these humble by-products of snacking are more versatile than they seem. Whether you’re looking for eco-friendly alternatives, creative DIY projects, or sustainable gardening hacks, walnut shells can surprise you with their usefulness. Here are ten creative ways to repurpose walnut shells and think outside the nut as well as some pictures of other ways people have refused and recycled them.
1. Natural Plant Fertiliser
Walnut shells, when crushed into smaller pieces, can be a fantastic addition to your garden soil. They improve drainage, aerate compacted soil, and slowly release essential nutrients as they break down. Simply grind the shells into smaller bits and mix them into your soil or compost pile. It’s a simple and sustainable way to boost plant health while reducing waste.
2. Eco-Friendly Abrasive Cleaner
Ground walnut shells make an excellent natural abrasive for cleaning tough surfaces without causing scratches. They’re gentle yet effective, ideal for polishing metal, scrubbing grime, or tackling burnt-on cookware stains. To prepare, grind the shells into a fine powder using a blender or mortar and pestle. Store in an airtight container and mix with a bit of water or your favorite eco-friendly cleaner for use.
3. DIY Candle Holders
Transform walnut shell halves into charming miniature candle holders for a cosy, rustic touch. Start by cleaning the shells thoroughly and ensuring they’re dry. Melt wax and pour it into the shell halves, adding a small wick in the center. Once set, these unique candles make beautiful decorations for tables, gift boxes, or special occasions.
4. Natural Mulch for Gardens
Using walnut shells as mulch is a practical and aesthetically pleasing way to protect your plants. Spread a layer of crushed shells around your flower beds or vegetable garden to help retain soil moisture, regulate temperature, and prevent weeds. The shells’ rich brown hue also adds a decorative touch to your garden.
5. Handmade Jewellery
Get creative by turning walnut shells into one-of-a-kind jewelry pieces. Their natural shape and texture make them perfect for pendants, earrings, or brooches. Sand down the edges, paint or carve designs onto the shells, and add embellishments like beads or metallic accents. A bit of imagination can turn them into striking wearable art.
6. Pet-Friendly Toys or Bedding
For small pets like hamsters, gerbils, or birds, walnut shells can be repurposed as bedding or toy fillers. Clean and crush the shells to create a natural, absorbent material that’s gentle on tiny paws. Alternatively, use whole shells to create puzzle toys for birds or hide treats for small animals to discover.
7. Unique Home Décor Pieces
Walnut shells lend themselves beautifully to rustic home décor projects. Create miniature boats, trinket dishes, or seasonal decorations like Christmas tree ornaments. For a quick project, use whole shells as accents in wreaths or table centrepieces. With a bit of creativity, they can add charm and character to your living space.
8. Exfoliating Beauty Products
Walnut shells can be ground into a fine powder and used as a natural exfoliant in homemade beauty products. Mix the powder into a base of honey, yoghurt, or coconut oil for a gentle scrub that leaves skin smooth and rejuvenated. Do note, however, that this is best for tougher areas like elbows and knees, as walnut shell powder can be too abrasive for sensitive facial skin.
9. Biofuel and Energy Applications
While not a DIY idea, it’s fascinating to know that walnut shells are being used in industrial biofuel production. They’re a renewable energy source that can be processed into biomass fuel, reducing reliance on fossil fuels. While you might not be able to try this at home, it’s a testament to the potential of repurposing natural materials on a larger scale.
10. Miniature Art Projects
Walnut shells are perfect for tiny, whimsical art projects. Use the shells as bases for miniature dioramas, plant tiny succulents in them, or craft little animals and figures. These projects are fun for kids and adults alike, offering endless opportunities to let your creativity shine.
Who knew walnut shells could be so versatile? From the garden to the craft room, these simple shells have a surprising range of uses that can inspire your sustainable lifestyle. Whether you’re crafting jewellery, improving your soil, or making eco-friendly cleaners, walnut shells prove there’s always more to a nut than meets the eye.
Why not try one of these ideas and see where your creativity takes you? And if you come up with a new use for walnut shells, we’d love to hear about it—share your thoughts in the comments below!
Ready to give walnut shells a second life? Get cracking!