Haifa Cal GG 15.5-0-0, 50 lb

Greenhouse-Grade Calcium Nitrate for Professional Horticulture

Haifa Cal™ GG (Greenhouse Grade) delivers fully water-soluble calcium nitrate optimized for fertigation, hydroponics, and foliar applications in controlled-environment agriculture. With 15.5% nitrogen and 19% calcium, this greenhouse-grade formulation provides efficient, plant-available sources of both nutrients. Free of chloride, sodium, and sulfate, Cal GG ensures clean nutrition without salt accumulation or nutrient antagonism—critical for high-value greenhouse crops and intensive production systems.

Key Benefits

Complete Water Solubility: Dissolves fully and rapidly in cold water, ideal for injection systems, drip irrigation, and hydroponic nutrient solutions

Efficient Calcium & Nitrogen Source: Provides readily available calcium and nitrate nitrogen for optimal plant uptake and utilization

Chloride & Sulfate Free: Prevents salt accumulation and eliminates precipitation issues when mixed with other fertilizers (except phosphates and sulfates)

Continuous Calcium Supply: Addresses calcium's immobility in plants by providing steady nutrition throughout the crop cycle

Quality Enhancement: Strengthens cell walls, improves firmness, reduces physiological disorders (blossom end rot, tip burn), and extends shelf life

Greenhouse-Grade Purity: Low heavy metal content and minimal impurities ensure safe use in recirculating systems and on high-value crops

Technical Specifications

Total Nitrogen (N): 15.5%

Calcium (Ca): 19.0%

Analysis: 15.5-0-0 + 19% Ca

Form: Water-soluble white granular/prilled

Chloride: Free

Sulfate: Free

Sodium: Free

Package: 50 lb. bag

Application Guidelines

Hydroponics/Soilless Systems: Maintain 150-200 ppm N and 150-180 ppm Ca in nutrient solution for most greenhouse crops. Adjust based on crop type, growth stage, and water quality. Prepare separate stock tanks (A and B) to prevent precipitation with phosphate and sulfate sources.

Fertigation/Drip Irrigation: Apply 10-25 lbs per acre per week through injection systems. Dissolve completely before injection. Ideal for greenhouse tomatoes, peppers, cucumbers, lettuce, and ornamentals grown in soilless media.

Foliar Application: Mix 2-4 lbs per 100 gallons of water. Apply during active growth periods to prevent calcium deficiency disorders. Spray during cooler parts of the day or under reduced light to maximize absorption and minimize leaf burn.

Stock Solution Preparation: Dissolve in water according to your fertigation system requirements. Always prepare calcium nitrate in a separate tank (Tank A) from phosphate and sulfate fertilizers (Tank B) to prevent precipitation.