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Calcium Nitrate 15.5-0-0 Fertilizer

PowerGrow Systems

  • $ 1199

Calcium Nitrate is a fantastic 100% water soluble fertilizer that is used by hobbyists and professional growers world wide. It's high nitrogen levels encourage lush vegetative growth, and the water soluble calcium increases cell wall strength in plants and can prevent common calcium deficiencies like blossom end rot in tomatoes.

  • 100% Agricultural Grade Fertilizer
  • Fully water soluble - easy uptake by your plants!
  • Promotes lush green vegetative growth
  • Calcium increases plant resilience and prevents calcium deficiencies
  • NPK Ratio of 15.5-0-0 + Calcium


It is recommended to use in conjunction with other balanced fertilizers (We recommend MasterBlend). A suggested starting solution consists of 12g MasterBlend 4-18-38 fertilizer and 6g Epsom Salts (Completely dissolve in 5 gallons of water), and finally 12g Calcium Nitrate dissolved in water as the last step.


Foliar Application: Mix 2-4 tsp per 1 gallon of water and spray the foliage.

As a Supplemental (Side Dressing) Fertilizer Application: Apply 1 pound per 100 feet of row (1 cup per 50 feet of row or 1 level tablespoonful per plant). Apply to root growing area. Do not place within 2 inches of stalk or crown of plants. Do not allow contact with wet foliage.

On Apples: Ground application broadcast under the tree. Use at a rate of 1/2 pound for each year of tree growth to a maximum of 8 pounds per tree. Apply in February or apply in split applications in February and October.

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