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Calcium Nitrate


Calcium Nitrate is a colorless anhydrous salt and when combined with ammonium nitrate forms Calcium Ammonium Nitrate (CAN) used majorly as a fertilizer and also in cold packs. It is among the few fertilizers that are hygroscopic. Calcium Ammonium Nitrate is used as a nitrogen fertilizer in agriculture especially in acid soils for its mode of action is acidifying soils.

It is made up of 15.5% Nitrogen and 19% Calcium. Calcium Nitrate fertilizer enhances plants photosynthesis, reduces the soil acidity thus promoting the development of microorganisms in the soil that aid in the nitrogen fixation. Calcium Nitrate 15.5-0-0 (Ammonium Calcium Nitrate) is an important fertilizer that plays a big role in the maintenance of healthy cell walls in plants, because of its higher solubility in the soil, it helps the plants in absorbing other important nutrients in the soil.

Calcium Nitrate enhances uptake of potassium, magnesium, and calcium from the soil, as these are positively charged and fixed in the soil. The negative charge of nitrate releases them from soil and thus promotes their uptake as the solution of calcium nitrate sprayed on leaves to roots also.

SKU: masterblend-calnitrate Category: Tags: , , ,


Total Nitrogen 15.5%
Nitrate Nitrogen 14.4%
Ammoniacal Nitrogen 1.1%
Calcium 19.0%
Water Insoluble 0.2%
pH 5.0-7.0


Weight 1.0 kg, 500g, 250g, 100g, 50g

As the plants grow in the prepared mix, it is necessary to add more nutrients from time to time. Again, any one of several preparations could be utilized satisfactorily for this purpose, but one of the easiest to prepare solutions results from the use of commercially available soluble fertilizer. Two suggested solutions for weekly feedings are made with 4-18-38 analysis fertilizer at 1 pound per 100 gallons and 15.5-0-0 at 1 pound per 100 gallons.


A suggested schedule for their use would be to use the 4-18-28 for the first three weeks, followed by 4-18-38 the rest of the way. Where tomatoes are the primary crop, substitute 2 pounds of calcium nitrate (per 100 gallons water) for the complete fertilizer.

This should be done about every two weeks to insure adequate calcium and reduce blossom-end rot.