Nutrient composition and chloride-free advantage
NPK 00:00:50 provides an exceptionally high concentration of readily available potassium and elemental sulphur in a 100% water-soluble crystalline form.
Because it is synthesized as Potassium Sulphate (SOP), it is virtually chloride-free, making it the premier potassium source for chloride-sensitive horticultural crops.
- Nutrient analysis: 50% Potassium (K2O) and 17.5% Sulphur (S) in pure soluble form.
- Chloride-free: Less than 1% chloride, preventing leaf tip burn and salinity stress in sensitive crops.
- Low salt index: Favorable low electrical conductivity (EC) safe for foliar spraying and precision drip fertigation.
Physiological benefits during reproductive and ripening stages
Potassium is the primary osmotic regulator in plant biology, driving the translocation of photosynthetic sugars from leaves into developing fruits, tubers, and grains.
Concurrently, the accompanying sulphur supports protein synthesis, aromatic oil production, and chlorophyll maintenance.
- Fruit enlargement and weight: Enhances sugar accumulation, starch deposition, and uniform fruit sizing.
- Skin color and shelf life: Improves fruit luster, brix sweetness, and rind thickness, extending post-harvest storage life.
- Target crops: Grapes, pomegranate, citrus, banana, potato, tomato, onion, and pulses.
Fertigation protocols and foliar spray guidelines
NPK 00:00:50 dissolves quickly and completely in water, leaving zero insoluble residue to clog drip emitters or spray nozzles.
Apply via drip irrigation during the fruit sizing and ripening phases, or as a foliar spray during late reproductive stages.
- Drip fertigation: Injected through drip systems at label-recommended intervals during fruit enlargement.
- Foliar spray: Sprayed at container label dilution rates during early morning or late evening.
- Tank compatibility: Compatible with most neutral fertilizers; avoid mixing directly with highly concentrated calcium fertilizers in the same stock tank.
Official source
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Department of Fertilizers, Ministry of Chemicals and Fertilizers ↗Related on KisanPe
Common questions
What nutrients are present in NPK 00:00:50 fertilizer?
It contains 50% Potassium (K2O) and 17.5% Sulphur (S), with zero nitrogen and zero phosphorus.
Why is NPK 00:00:50 applied during the fruit ripening stage?
Potassium drives the transport of sugars and starches to developing fruits, enhancing fruit size, color, sweetness, and shelf life.
Is NPK 00:00:50 safe for chloride-sensitive crops?
Yes, being Potassium Sulphate (SOP), it is virtually free of chlorides and completely safe for grapes, citrus, and potatoes.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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