Ultra-Low Ammonium Calcium Nitrate for Precision Hydroponics

Haifa Cal™ Prime represents the next generation of calcium nitrate technology, delivering 17% nitrogen and 23.5% calcium with near-zero ammonium content (0.3% NH₄-N). This premium-grade formulation provides 17% higher concentration than conventional calcium nitrate while eliminating the pH instability and nutrient antagonism associated with elevated ammonium levels. Engineered specifically for hydroponic systems, soilless media, and high-intensity greenhouse production, Cal Prime ensures precise calcium and nitrate nutrition without compromising solution chemistry or plant health.

⚠ OXIDIZER 5.1: This product is classified as an oxidizer. Review safety data sheet before handling.

Key Benefits

• Ultra-Low Ammonium Formula: Only 0.3% NH₄-N (vs. 1.1% in standard calcium nitrate) prevents pH drift, reduces ammonium toxicity risk, and eliminates K/Ca uptake interference
• 17% Higher Concentration: More calcium and nitrogen per pound means reduced application volumes, lower freight costs, and less storage space required
• Hydroponic-Grade Purity: Fully water-soluble with minimal heavy metals and impurities; ideal for recirculating systems and precision fertigation
• pH Stability: Near-zero ammonium prevents acidification of growing media and nutrient solutions, maintaining optimal pH range for nutrient availability
• High-Light Performance: Eliminates ammonium toxicity risk in high-irradiance environments where accelerated NH₄ uptake can cause plant stress
• Complete Solubility: Dissolves rapidly and completely in cold water without residue or clogging in injection systems

Technical Specifications

• Total Nitrogen (N): 17.0%
• Nitrate Nitrogen (NO₃-N): 16.7%
• Ammonium Nitrogen (NH₄-N): 0.3% (ultra-low)
• Calcium (Ca): 23.5%
• Calcium Oxide (CaO): 33%
• Analysis: 17-0-0 + 23.5% Ca
• Form: Water-soluble white granular/prilled
• Package: 55 lb. bag
• Hazard Class: Oxidizer 5.1

Application Guidelines

Hydroponics/NFT/DWC: Maintain 150-200 ppm N and 150-180 ppm Ca in nutrient solution for most crops. Adjust based on crop type, growth stage, and water quality. Monitor EC and pH after addition. Do not mix concentrated stock solutions with sulfate or phosphate sources.

Fertigation/Drip Irrigation: Apply 10-30 lbs per acre per week through injection systems. Dissolve completely before injection. Ideal for soilless substrates (coco coir, rockwool, perlite) where ammonium control is critical.

Foliar Application: Mix 2-4 lbs per 100 gallons of water. Apply during vegetative growth and fruit development to prevent blossom end rot and tip burn. Spray during cooler parts of the day for optimal absorption.

Stock Solution Preparation: Maximum solubility is approximately 4 lbs per gallon of water at 68°F. Prepare separate A and B tanks to prevent precipitation with sulfates and phosphates.

Why Ultra-Low Ammonium Matters

In hydroponic and soilless systems, ammonium nitrogen can rapidly acidify growing media and nutrient solutions, requiring constant pH adjustment. Excess ammonium also competes with potassium and calcium uptake, potentially causing deficiencies even when these nutrients are present in solution. In high-light environments (supplemental lighting, high-altitude, or summer production), plants absorb ammonium at accelerated rates, increasing toxicity risk.

Haifa Cal Prime's 0.3% ammonium content (73% lower than conventional calcium nitrate) eliminates these issues while providing the full benefits of nitrate-based nitrogen and readily available calcium. The result is more stable pH, better nutrient balance, and superior crop performance in demanding production environments.

Ideal For

Hydroponic lettuce, tomatoes, peppers, cucumbers, strawberries, cannabis, and ornamentals; greenhouse production with supplemental lighting; soilless substrates (rockwool, coco coir, perlite); recirculating nutrient systems; high-irradiance growing zones; and any application where precise pH control and calcium nutrition are critical.

Important Safety & Handling Information

Calcium nitrate is a strong oxidizer. Store away from combustible materials, organic matter, and reducing agents. Do not mix dry product with sulfur, sawdust, or other flammable materials. Use appropriate PPE when handling. Review the safety data sheet before use.

Technical Resources:

• Safety Data Sheet (SDS)
• Technical Specification Sheet
• CDFA Registration & Heavy Metals Report

Haifa Cal Prime delivers the precision, purity, and performance that professional hydroponic growers demand.