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Fertilizers & Crop Nutrition

All 19 Fertilizer (19-19-19): NPK Composition, Uses & Dose

All 19 fertilizer, commonly known as 19:19:19, is a 100% water-soluble balanced complex fertilizer containing equal proportions of Nitrogen (19%), Phosphorus (19%), and Potassium (19%). Regulated under the Fertilizer Control Order (FCO), 1985, it is widely used for foliar spraying and fertigation to promote early vegetative development and balanced plant nutrition.

Last reviewed: 10 November 2026

Nutrient composition and balanced physiological role

  • Total Nitrogen (N - 19%): Supplies balanced nitrate, ammoniacal, and amide nitrogen to spur vegetative growth, branching, and chlorophyll formation.
  • Available Phosphorus (P2O5 - 19%): Supports energetic root branching, early flower initiation, and plant energy transfer mechanisms.
  • Soluble Potassium (K2O - 19%): Regulates stomatal opening, improves water use efficiency, enhances stem rigidity, and builds disease resistance.
  • 100% Water solubility: Completely dissolves without insoluble residues, preventing emitter clogging in drip irrigation and micro-sprinklers.

Crop recommendations and critical application stages

  • Vegetative establishment: Ideal for young field crops, fruit saplings, and transplanted vegetable seedlings during active root and shoot expansion.
  • Horticulture crops: Applied in tomato, chilli, capsicum, onion, potato, pomegranate, grapes, and banana.
  • Field crops: Applied as a supplemental foliar nutrition spray in cotton, wheat, paddy, pulses, and sugarcane.
  • Stress recovery: Quickly revitalizes crops suffering from waterlogging, temporary drought, or pest damage shock.

Application techniques, fertigation, and compatibility

  • Foliar spray: Dissolve 4 to 5 grams per litre of clean water (or 1 kg per acre in 200 litres of water); spray in early morning or late evening.
  • Drip fertigation: Administer 2 to 3 kg per acre per fertigation round according to crop nutrient demand schedules.
  • Compatibility: Compatible with most neutral pesticides; avoid mixing with calcium fertilizers or concentrated alkaline chemicals.
  • Storage: Keep bags tightly sealed in a dry, ventilated shed to prevent moisture absorption and caking.

Official source

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Department of Fertilisers (Govt of India) ↗

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Common questions

What does All 19 fertilizer contain?

It contains 19% Total Nitrogen, 19% Available Phosphorus (P2O5), and 19% Water-Soluble Potassium (K2O).

What is the best time to apply 19-19-19 fertilizer?

During the active vegetative growth stage, early branching, and initial tillering before flower development.

Can 19:19:19 fertilizer be used in drip irrigation systems?

Yes, it is 100% water-soluble and engineered specifically for drip fertigation and foliar spraying.

What is the standard foliar spray dose for 19:19:19?

The general recommendation is 4 to 5 grams per litre of water, or about 1 kg per acre in 200 litres of water.

General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.

More Fertilizers & Crop Nutrition guides

Planofix Plant Growth Regulator (NAA): Uses & ApplicationNPK 19 19 19: Uses, Soil Testing and Safe ApplicationCultar Paclobutrazol: Mango Flowering, Dosage and Application

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