Collection: PureCal 13-0-0 Ammonium-Free Calcium Nitrate Fertilizer

Professional-Grade Calcium Nitrate — 100% Ammonium-Free

PureCal is the trusted choice for professional growers who demand purity and precision. This greenhouse-grade calcium nitrate delivers a clean, fully soluble source of nitrate nitrogen and calcium — with zero ammonium (NH₄). Whether you're running a commercial greenhouse, a recirculating hydroponic system, or a high-value crop operation, PureCal gives you the consistent, predictable nutrition your plants need to thrive.

Why Growers Choose PureCal

• 100% nitrate nitrogen — no ammonium, ideal for sensitive hydroponic and NFT systems
• 18% calcium — strengthens cell walls, reduces tip burn, and improves fruit quality
• Highly pure white crystals — dissolves completely with no residue or clogging
• Precise dosing — 1 gram per gallon yields 34.32 ppm nitrate-N and 47.52 ppm calcium
• Made in the USA — by The Andersons, a trusted name in professional horticulture

Available Sizes

• 1 lb jar — ideal for home growers and trialing
• 4 lb jar — great for hobbyists and small systems
• 20 lb pail — suited for mid-size operations
• 40 lb pail — commercial greenhouse standard
• 55 lb bag — bulk supply for large-scale production