Hydroponic Grade Potassium Nitrate Fertilizer – 40 lb Bucket

Hydroponic Grade potassium nitrate fertilizer (KNO3 fertilizer) supplies nitrate nitrogen and water-soluble potassium for soilless greenhouse crops with drain-water recirculation. This hydroponic-grade fertilizer has an extra-low-sodium specification. This 40 lb bucket contains four 10 lb bags in a 5-gallon bucket, not a single manufacturer bag.

Manufacturer Specifications

• Nitrate nitrogen (N): 13.5% typical; 13.1% minimum
• Water-soluble potassium as K₂O: 46.5% typical; 46.2% minimum
• Elemental potassium (K): 38.6% typical; 38.4% minimum
• Sodium (Na): 150 ppm typical; 300 ppm maximum
• pH (10% solution): 9.1 typical; specification range 6–11
• Water-insoluble matter: 350 ppm typical; 700 ppm maximum

Typical figures are not guaranteed minimums. Source: Hydroponic Grade technical data sheet, May 2019.

Use and Grade Selection

This fertilizer's low sodium specification helps limit the sodium contributed by this fertilizer to recirculating nutrient solutions. It does not eliminate sodium from source water or other inputs. Monitor water and nutrient-solution chemistry, and choose rates according to the product label and complete crop nutrition program.

For a separate grade comparison, see Haifa Multi-K GG. The greenhouse and hydroponic grades have different specifications.

Packaging and Shipping

40 lb total: 4 × 10 lb bags in a 5-gallon bucket.

Ground shipping only (UPS/FedEx) — Hazardous Material 5.1 Oxidizer.

Safety Data Sheet

Download the Haifa Multi-K Potassium Nitrate Safety Data Sheet (SDS).

Product Label

Download the full 40 lb Hydroponic Grade Potassium Nitrate label (PDF).