Monopotassium Phosphate (MKP)

MKP - Monopotassium Phosphate

Hortipray® MKP is a soluble monopotassium phosphate fertiliser in the form of a free flowing crystalline powder.


Hortipray® MKP quickly dissolves to provide the much needed phosphorous and potassium to plants at all growth stages, in hydroponics as well as soil grown crops. Our product is free of chlorine, sodium and heavy metals.
Hortipray® MKP has been produced for 20 years by Prayon at our plant in Puurs, Belgium. The high quality of our standard product makes Hortipray® MKP suitable for all fertigation systems through drip irrigation, NFT, sprinklers, centre pivots and lateral movement irrigation systems


Hortipray® MKP can be mixed with all water-soluble fertilisers, except for calcium fertilisers and concentrated magnesium solutions. In hydroponic systems, it should normally be added to the B tank along with the sulphates and trace elements.
Hortipray® MKP has a buffering effect which will help stabilise the pH of the solution at around 4.5.

Product specifications

Chemical formula: KH2PO4
Phosphorous (P2O5) 52.1%
Phosphorous (P) 22.7%
Potassium (K2O) 34.5%
Potassium (K) 28.6%
Solubility (20°C) 225,5 g/L water
EC (1 g/L at 25°C) 0.7 mS/cm
pH (1% solution) 4.5

Packaging and transportation

25 kg bag: Polyethylene
Big Bag: Woven polypropylene (with an inner liner) of 250 to 1200 kg

Packing and storage on pallets at the production site keep the purity level high. Hortipray® MKP can be delivered by road, railway and sea.

Quality certifications

ISO 9001
OHSAS 18001
ISO 14001