Can I Compost Nut shells?
Yes
Nut shells can be composted.
What to Know
- Nut shells can be composted, but they break down very slowly
- They're considered a 'brown' material, adding carbon to your compost
- Some nut shells, like walnuts, contain juglone which can inhibit plant growth
Tips
- Crush or grind nut shells into smaller pieces to speed up decomposition
- Use in moderation and mix well with other compost materials
- Avoid using black walnut shells in compost intended for sensitive plants