Can I Compost Oyster shells?
Yes
Oyster shells can be composted.
What to Know
- Oyster shells are slow to decompose and are rich in calcium
- They can help balance pH in acidic soils and provide essential minerals
- Shells should be cleaned and crushed before adding to compost
Tips
- Crush shells into small pieces to speed up decomposition
- Use sparingly as they decompose slowly
- Consider using as a soil amendment directly in garden beds for calcium-loving plants like tomatoes