Can I Compost Egg Shells?
Eggshells are excellent additions to compost because they provide valuable calcium and other minerals for your plants.

Sourced & Cited
Eggshells are a great way to add calcium to your compost pile, benefiting your plants and enriching the soil. They break down relatively slowly, so don't worry about them disappearing immediately. This slow decomposition provides a steady release of nutrients.
Compost Classification
Neutral: Eggshells are considered neutral in the brown/green balance of composting because they are primarily composed of calcium carbonate, a mineral substance. They don't contribute significantly to either nitrogen or carbon content in the compost.
🌱 Key Nutrients
This item contributes the following nutrients to your compost:
Calcium (Ca) Trace Minerals
🏷️ Tags
Important characteristics to know about this item:
Breaks Down Slowly Pest Attraction Risk Adds Key Nutrients
⚠️ Potential Risks
- Pest attraction: While not a major risk, crushed eggshells can sometimes attract pests if not properly incorporated into the compost pile.
- Slow decomposition: Eggshells decompose slowly; larger pieces may take a considerable amount of time to fully break down.
💡 Best Practices
- Crush eggshells before adding them to your compost pile. This increases their surface area and speeds up decomposition.
- Don't add too many at once; distribute them evenly throughout the pile to avoid creating localized clumps.
- Rinsing eggshells before adding them is helpful to avoid introducing excess salt or potentially harmful bacteria.