Monopotassium Phosphate (MKP) 0-52-34 is a nitrogen-free, 100% water-soluble P-K fertilizer — a single technical-grade crystal (potassium dihydrogen phosphate) supplying 52% available phosphate (P₂O₅) and 34% soluble potash (K₂O) with no nitrogen and no fillers.
The zero-nitrogen profile is what defines MKP: at flowering and fruit set it delivers concentrated phosphorus and potassium without pushing new vegetative growth, which is why it is a standard bloom-phase source in commercial hydroponic and fertigation programs. Phosphorus supports energy transfer, root development, and flower initiation, while potassium supports fruit size, sugar movement, and post-harvest quality. MKP also has a low salt index, making it usable as a foliar spray at concentrations that would burn most other phosphate sources.
It dissolves completely with no residue and works in foliar sprays, drip and field fertigation, and recirculating hydroponic systems. The one essential rule: phosphate and calcium should never be combined in a concentrated stock tank, as they form an insoluble precipitate — keep MKP and calcium-containing fertilizers in separate stock tanks and combine them only in the dilute stream. Spray in cool hours, and store sealed and dry.
CDFA registered and third-party lab tested for heavy metals, with results consistently well below required limits.