Potassium Nitrate — Premium N + K for Fertigation & Foliar
Potassium nitrate combines nitrate nitrogen with chloride-free potassium in a single highly soluble crystal — the gold standard for greenhouse tomato and pepper fertigation during fruiting stages. The 13% N and 46% K2O analysis supports fruit size, colour and sugar accumulation without adding chloride or sulphate that could disrupt nutrient balance. Low insolubles (0.1% max) protect drip emitters. MOQ from 300 MT.
Technical Specification
- FOB
- CFR
- CIF
- Agriculture
- Blending
- Fertigation
Greenhouse Application
During fruiting, potassium nitrate typically replaces 30–50% of the total potassium input in drip programmes for solanaceous crops. Apply in alternating cycles with calcium nitrate to maintain cation balance. Technical grade ships in 25 kg bags; bulk big-bag available for large greenhouse complexes. HS 2834.21.
FAQ
Why is potassium nitrate preferred during fruit ripening?
Nitrate at low concentration during ripening maintains energy metabolism without promoting vegetative flush, while potassium drives sugar transport into fruit. This N:K ratio matches crop demand during the yield-critical phase.
Can potassium nitrate be mixed with phosphates in fertigation?
Avoid direct mixing of concentrated KNO₃ with calcium or magnesium phosphates — precipitation will occur. Use separate stock tanks (A/B system) or apply in sequential irrigation cycles with adequate flushing between inputs.
What distinguishes technical from agricultural grade KNO₃?
Technical grade has tighter insoluble and chloride limits for precision fertigation systems. Agricultural grade suits solid application and less sensitive drip setups at lower cost per kg K2O.