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: 

• 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. Gently mix into top 5cm (2”) of soil.

• 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   

GUARANTEED ANALYSIS:

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

This product complies with Canada’s Organic Production Systems General Principles & Management Standards and Permitted Substances Lists (CAN/CGSB-32.310-2021 CAN/CGSB-32.311-2020)