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Oyster Shell Flour
Oyster Shell Flour
Oyster Shell Flour
Brand: Down to Earth
Item Number: F018

Oyster Shell Flour (5 Lb Box)

Improves Soil Tilth and Builds Healthy Root Systems

Listed for Use in Organic Agriculture by the Organic Materials Review Institute Approved for Organic Agriculture by the California Department of Food and Agriculture

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Down To Earth’s Oyster Shell is an all-natural and high-quality source of the essential plant nutrient calcium. Ancient oyster shells are carefully harvested and then ground into small, medium and coarse particles. These irregular shapes provide a sustained release of this valuable nutrient. DTE Oyster Shell also aids in improving structure of soils and building optimum tilth.

  • Natural, organic source of calcium is used to correct Ca deficiencies and raise pH in acidic soils.
  • Contains 35% calcium
  • Variable particle size provides both immediate and long-term fertilization.
  • Use at 2.5-5 lbs per 100 square feet or 2.5-5 lbs per 100 square feet, depending on soil analysis and crop. Repeated applications may be needed to fully adjust pH and Ca levels. Spread 1 lb per 1″ of trunk diameter around the base outwards to the drip line, mix into soil surface and water in well.



    Organic Status :
    Approved for Use in Certified Organic Agriculture
    Animal-Based : Yes
    Fertilizer Type : Powdered/Granulated/Meal
    Major Nutrients : Calcium
    Major Nutrients : Trace Minerals
    Nutrient Release Rate : Long-term (4+ Months)
    pH Adjusting : Corrects Low pH
    Use as Foliar : No
    Organic Certifier: OMRI, CDFA


    Shipping Weight: 6.0 lb

    Dimensions: 11.0"L x 8.25"W x 3.0"H


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