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6lbs of Oyster Shell Flour (2 cups ≈ 1 lb)


1 cup per 7.5-gallons of new homemade base soil. Used for ph correction when making new homemade base soil from the recipe in Step 1 of the instructions. Link to Instructions - Click Here


*If you are using high quality bagged soil, or re-amending used soil then you do not need to add this.* This is for the ph correction of the acidic peat moss when making new homemade base soil only.


Ancient oyster shells are carefully harvested and then ground into small, medium and coarse particles. These irregular shapes provide a sustained release. Oyster Shell also aids in improving structure of soils and building optimum tilth.


OMRI listed for organic use.

Registered cdfa organic input material.

6lb - Oyster Shell Flour

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