Ultra-low-ammonium calcium nitrate for professional nutrient programs

Haifa Cal Prime is a fully water-soluble calcium nitrate fertilizer supplying 17.0% total nitrogen and 23.5% calcium, with only 0.3% ammonium nitrogen. It is designed for hydroponics, soilless media, fertigation, and high-intensity greenhouse production where precise nutrient and pH management matter.

Why growers use Cal Prime

• 17-0-0 analysis: 16.7% nitrate nitrogen and only 0.3% ammonium nitrogen.
• 23.5% calcium: Delivers readily available calcium in a concentrated formula.
• Fully water soluble: Dissolves rapidly for nutrient solutions and injection systems when prepared correctly.
• Low ammonium: Supports tighter control of nutrient-solution and growing-media chemistry.
• Concentrated formula: 17% higher concentration than conventional calcium nitrate, according to the product information.

Technical specifications

• Package: 55 lb. bag
• Analysis: 17-0-0 + 23.5% calcium
• Calcium oxide (CaO): 33%
• Form: Water-soluble white granular/prilled material
• Hazard class: Oxidizer 5.1

Application guidance

• Hydroponics, NFT, and DWC: The product information lists 150–200 ppm nitrogen and 150–180 ppm calcium for most crops. Adjust for crop, growth stage, and water quality, then monitor EC and pH.
• Fertigation: The product information lists 10–30 lb. per acre per week through injection systems. Dissolve completely before injection.
• Foliar application: The product information lists 2–4 lb. per 100 gallons of water. Apply during cooler parts of the day.
• Stock solutions: Maximum solubility is approximately 4 lb. per gallon at 68°F. Prepare separate A and B tanks to help prevent precipitation with sulfate and phosphate sources.

Compatibility: Do not mix concentrated stock solutions with sulfate or phosphate sources.

Safety: Calcium nitrate is a strong oxidizer. Store away from combustible materials, organic matter, and reducing agents. Review the SDS before handling and use appropriate PPE.

Use according to the product label, crop program, water quality, and applicable regulations.