Materials that supply calcium (Ca) and magnesium (Mg)

Materials that supply calcium (Ca) and magnesium (Mg)

MATERIAL % Ca % Mg TNP*
Aragonite 37-39 <0.5
Bone meal 23 0.4 60-70
Calcium limestone CaCO3 32 3 85-100
Dolomite limestone Ca/MgCO3 22 11 95-108
Epsom salt MgSO4 · 7H2O 10
Gypsum CaSO4 · 2H2O 23
Kieserite MgSO4 · H2O 18
Phosphate rock 24 50
Potassium Magnesium Sulfate K2SO4 · 2MgSO4 11
Wood ashes 23.3 2.2
*Total Neutralizing Power (as % CaCO3)

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