Oyster Shell Flour
Crushed oyster shells have many uses in the garden. Most notably, they a fantastic source of elemental calcium which releases slowly into the soil and reduces soil acidity.
Oyster shell contains approximately:
Oyster shell contains approximately:
- Calcium - 36%
- Magnesium - 0.025%
- Potassium - 0.05%
- Sulphur - 0.037%
- Phosphorous - 0.03%
- Iron - 0.1176
- Manganese - 0.037%
- Zinc - 0.0037%
- Copper - 0.0009
- Molybdenum - 0.0003
- Boron - 0.0321
Information
Sources
- Jericho Products (Pacific Pearl Oyster Shell Flour)
- TPi Remixes (Mineral content pdf)
Sources