Haifa Cal Prime 17-0-0 + 23.5% Ca

Haifa Cal Prime — Professional Foliar Calcium Nitrate Fertilizer

Haifa Cal Prime is the preferred foliar calcium nitrate for commercial greenhouse and nursery operations where rapid calcium delivery is critical. With 23.5% calcium and 17% nitrate nitrogen, Cal Prime delivers the highest calcium concentration of any major calcium nitrate formulation — making it exceptionally effective for foliar correction of calcium deficiency disorders before they impact crop quality and marketable yield.

Fully water-soluble, anhydrous, and free of chloride, sulfate, and sodium — Cal Prime dissolves cleanly in spray water with no residue, clogging, or phytotoxicity risk when applied at recommended rates.

Why Cal Prime for Foliar Applications

• 23.5% calcium — highest calcium content per unit weight; more calcium delivered per spray application
• Only 0.3% ammonium — near-pure nitrate nitrogen minimizes phytotoxicity risk during foliar application
• Anhydrous formula — higher nutrient density; less product needed per tank mix
• Chloride & sodium free — no leaf burn risk from chloride; safe for sensitive crops and high-frequency spray programs
• Rapid absorption — calcium and nitrate nitrogen are immediately available upon foliar uptake
• Clean spray solution — dissolves completely with no residue or nozzle clogging

Foliar Application Targets

• Tip burn — lettuce, cabbage, Brussels sprouts, and leafy greens during rapid growth periods
• Blossom end rot — tomatoes, peppers, cucumbers, and squash during fruit set and development
• Bitter pit — apples and pears during fruit development
• Fruit cracking — tomatoes and cherries under fluctuating moisture conditions
• Soft fruit disorders — strawberries and other soft fruits requiring strong cell wall development

Application Guidelines

Mix 2–4 lbs per 100 gallons of water for foliar spray. Apply during cooler parts of the day or under reduced light intensity to maximize absorption and minimize evaporation. Avoid application during heat stress or when plants are wilted. Can be tank-mixed with most foliar fertilizers and crop protection products — always perform a jar test before mixing.

⚠️ Do not mix concentrated Cal Prime solutions with phosphate or sulfate fertilizers — prepare separately and combine only in the dilute spray tank.