OYSTER SHELL FLOUR
OYSTER SHELL FLOUR

OYSTER SHELL FLOUR

Regular price $14.00
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OYSTER SHELL FLOUR 

This flour is made from oyster shell deposits in South San Francisco Bay. Oyster shell flour is an excellent source of natural calcium.

  • The calcium carbonate in the oyster shells helps to neutralize acidic soils 
  • A natural alternative to dolomite lime (mined limestone)
  •  provides a sustained release of calcium and micronutrients
  • A great addition to your soil for leafy greens like spinach and lettuce or brassicas like cabbage and broccoli 
  • A great addition to compost and worm bins 

    APPLICATION:

    • Gently mix into the top 5cm (2”) of soil   
    • In the garden: Up to 1-2kg per 10m2 (2-4lbs per 100ft2). Apply up to once per month
    • Topdressing: 10-15ml (2-3tsp) per plant, or 5-10ml per 4L (1-2tsp per gal) of soil, once per month
    • Premixing soil: 30ml per 4L (2 tbsp per gal) of soil. For larger volume soil mixing add up to 2.5kg (5lbs) per cubic yard of soil
    • Reducing Soil Acidity: Based on the results of a soil test apply 1-7kg per 10m2  

    ANALYSIS:

    • Total Calcium (Ca): 36%
    • Calcium Carbonate: 91%
    • Calcium Carbonate Equivilant: 92%

    This product complies with Canadian certified organic crop production standards.

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