Can You Compost Nut Shells?

Yes, you can use leftover nut shells as compost ingredients. Nut shells would be considered brown compost ingredients (source of carbon).

Keep in mind, however, that nut shells can take a long time to decompose so they may not be suited for people who maintain a small compost heap at home. You should also using walnut shells as they may contain a chemical called juglone, which could be toxic to some plant species.

Nut shells can also be mixed with other brown ingredients to form high-quality mulch. This could be useful for people who need to help the ground retain soil moisture or to regulate soil temperature.


Nutshell Compost