Walnut shells can be used for cleaning and polishing, as a filler in dynamite, and as a paint thickening agent. Shells from pecans, almonds, Brazil nuts, acorns, and most other nuts are useful in composting.

Are nut shells good for anything?

Use them in the garden

Nutshells contain nutrients that your garden will love you for, but that's not the only way they're handy. Did you know that pistachio shells are great at helping with drainage? Put them in the bottom of your flowerpots to help prevent water logging.

Are nut shells good for the garden?

Nut Shells

The shells from peanuts and pistachios are a good addition to your compost heap because they don't break down as quickly as other items. These larger pieces can help vary the thickness of the compost, which will aid in soil aeration. Wash them thoroughly to rid them of salt, which can kill plants.