Monopotassium Phosphate

Product characteristics

Monopotassium Phosphate

  • Fully water-soluble, crystalline product
  • Low in chloride, sodium and other detrimental elements.
  • When high levels of phosphorus and potassium are required without nitrogen: e.g. at the productive stages for sugar rich fruit crops, to increase sugar content and improve quality
  • Used for foliar feeding, fertigation and as an ingredient in NPK’s.
  • Compatible with most water-soluble fertilizers


Dosing instructions

G / 1.000 l stock solution P2O5 K K2O
In g / 1.000 l or ppm In g / 1.000 l or ppm In g / 1.000 l or ppm
100 52 28 34
130 68 37 44
160 83 44 54
190 99 53 64
210 110 58 71

The table above represents the amount of nutrients in the stock solution. The final concentration in the irrigation water depends on the amount of nutrients in the stock solution, the injection ratio as well as the amount of nutrients in the water used.

Dosing instructions | Fertigation

Crop Application date Total dosage in kg / ha
Fruit trees Possible use during entire crop cycle.
Due to lack of Nitrogen even till the end of season.
100 – 200 kg
Vineyards (adult table grapes) Use during central part of fertigation program. In case of deficiency, usable as of the start 50 – 200 kg
Vegetables Beginning of vegetative growth until 2-4 weeks before harvesting 100 – 250 kg
Potatoes From tuber initiation till ripening stage 100 – 200 kg
Tomatoes From 1 month after transplantation until maturation stage 150 – 300 kg

Dosing instructions | Foliar

Crop Application date Dosage in kg / application* Concentration of spray solution (w/v)
Apple, pear 1 – 3 applications:
- End of flowering stage / early fruit enlargement
4 – 12 kg/hа 0.5 – 1.5%
Stone Fruits 2 – 3 applications:
- From fruit setting until fruit colouring
- 5 – 10 kg/ha - 1.0 – 1.5%


Available in packages of 1.000 kg and 25 kg.

Function of Phosphorus

Phosphorus plays a major role in photosynthesis and respiration. As an ATP (adenosine triphosphate), phosphorus stores and transports energy within the cells of the plant and contributes to a better metabolism. Phosphorus is also present in RNA and DNA structures, major components of genetic information. In mature plants, seeds have the highest concentration of phosphorus. Shoots and root rips have a high metabolism and a rapid cell division and require phosphorus in large quantities. Phosphorus supports root development, flower initiation and seed and fruit development. In some plants, it can reduce disease. Phosphorus can also improve the quality of certain crops.

Deficiency of Phosphorus

Phosphorus deficiency symptoms are often hard to detect because they are not usually very distinct. Relative smallness and reduced growth compared to healthy plants are the best indicators. As a rule, plants suffering from phosphorus deficiency develop more slowly and are often mistaken for much younger plants because of their size. Other visible indicators of phosphorus deficiency can be a purple stem, petiole and leaves. These indicators are limited to corn, tomato, lettuce and all varieties of brassica. Brown veined leaves and a grey luster can be found on plants with severe Phosphorus deficiency.
Phosphorus-deficiency-on-tomato-leaf oilseed_rape_leaf2