ultra-micronized, high-quality Calcium Carbonate (CaCO3) from very pure  Calcitic lime sources free of magnesium and heavy metals.
The tiny particle size permits the plant to pick up micronized rocks that enter through the Stoma (leaf pore) or roots directly in the water solution.

CAL106 delivers not only Calcium (Ca) but also Carbonate (CO3), the big brother of CO2 directly into the plant whether-applied foliar or feed to the soil/medium and is recommended 0.5 to 2 grams/gallon as a feed or foliar.