Once enjoyed and properly cleaned, oyster shells can be reused—whole or crushed—in many smart, eco-friendly ways.

• Flower pots & drainage Replace clay balls with slightly crushed shells at the bottom of pots to improve drainage and protect roots from excess water.
• Natural fertilizer & compost booster Rich in calcium, magnesium, and trace elements like zinc, crushed shells help aerate compost, enrich soil, and support stronger plant growth.

• Natural pest barrier
  Scatter small shell pieces around plants to deter slugs and snails—the sharp texture keeps them away without chemicals.

• Dietary supplement
  Added to chicken feed, oyster shells provide essential calcium that strengthens eggshells and bones, improving overall health.

• Anti-scale solution
  Place shells in the toilet tank, kettle, or washing machine to help reduce limescale buildup naturally.

✨ Decoration & everyday uses

• Table décor or name cards
• Small containers for salt & pepper
• Jewelry holders or decorative accents

To avoid sharp splinters, place clean, dry shells in a cloth and gently crush them with a hammer or large stone until you get small, manageable pieces. Always protect your hands and eyes

Do you have more ideas?or practical tips : Please share them!

Source : Comment recycler mes coquilles à la maison par Comité Régional de la Conchyliculture Charente Maritime et
Operation seconde vie pour vos coquilles dhuitres de SiREDOM