Calcium Nitrate — Soluble Ca + N for Fertigation & Foliar
Calcium nitrate supplies nitrate nitrogen and soluble calcium in a single highly soluble salt — the standard corrective for blossom-end rot in tomatoes and tip burn in lettuce. The 15.5% N and 26% CaO analysis dissolves cleanly in drip tank systems without emitter clogging when properly filtered. Used extensively in greenhouse vegetable production, orchard foliar programmes and hydroponic nutrient solutions. Export from 1,000 MT.
Composition & Limits
- FOB
- CFR
- CIF
- Agriculture
- Blending
- Fertigation
Fertigation Guidelines
In drip systems, calcium nitrate is typically injected at 0.5–2.0 mmol/L depending on crop stage and water calcium content. Never mix concentrated calcium nitrate with phosphate or sulphate fertilizers in the same stock tank — insoluble precipitates will form. Shipped in 25 kg bags or 1,000 kg big bags; moisture below 0.5% preserves caking resistance. HS 3102.60.
FAQ
Why is calcium nitrate preferred over lime in greenhouse production?
Lime is insoluble and cannot deliver calcium through drip lines. Calcium nitrate provides immediately available Ca²⁺ ions that reach fruit tissue within days, preventing physiological disorders that lime application cannot correct mid-season.
Can calcium nitrate be applied as a foliar spray?
Yes. Foliar application at 0.5–1.0% concentration (5–10 g/L) corrects acute calcium deficiency in fruiting crops. Apply during cool morning hours to maximize leaf absorption and minimize burn risk.
What water quality issues affect calcium nitrate fertigation?
High bicarbonate irrigation water above 150 mg/L CaCO₃ can precipitate calcium from the solution. Acidify irrigation water to pH 5.5–6.0 before injecting calcium nitrate in hard-water regions.