Foliar Greenhouse fertigation Open field fertigation

Van Iperen Monopotassium Phosphate (MKP) Horticultural Grade is a highly pure Phosphate fertilizer, free of Nitrogen, which dissolves rapidly and completely. Our product has a limited caking sensitivity and is recommended during root and shoot development. The high level of Phosphate in our formula increases cell division and development of new plant tissue. The presence of Potassium has a positive effect on the uptake of Phosphate in the plant.

  • Improves root and shoot growth
  • Limits vegetative growth as of fruit setting
  • Developed for fertigation in open field and greenhouses. Also suitable for foliar application
Foliar Greenhouse fertigation Open field fertigation
  • Low on heavy metals
  • Low on Sodium and Chloride
  • White crystals
  • Easy to handle, dissolve and apply


Kg in 1.000 l stock solution K2O in kg
100 34,0
125 42,5
150 51,0
175 59,5

Mentioned concentrations 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 and the amount of nutrients used in the water.


Crop Application date Min kg/ha/season Max kg/ha/season
• As of vegetative growth 100 250
Fruit bearing vegetables
• As of vegetative growth
• Until 2 - 4 weeks before harvesting
100 300
Fruit bearing vegetables
• As of vegetative growth
• Until fruit setting
150 300
• During entire fertigation program 200 300
Citrus (adult)
• During entire fertigation program 150 300
• As of tuber setting
• Until mid of tuber filling
100 200
Vineyards (adult)
• During entire fertigation program 50 200
• As of 4 weeks after planting
• Until fruit ripening
150 300

Foliar Application

Crop Application date Min kg / ha / appl Max kg / ha / appl Conc. % (w/v))
2 - 4 applications:
• As of plant establishment
• Until 12 leaves stage
• During shooting stage
6 15 1.0 - 2.0
1 application:
• During fruit filling
6 15 1.0 - 2.0
2 - 4 applications:
• Until flower bud opening
10 18 1.0 - 2.0
Pip fruit
1 - 3 applications:
• As of end of flowering
• Until fruit setting
4 12 0.5 - 1.0
Stone fruit
1 - 3 applications:
• As of fruit setting
• Until fruit colouring
5 10 0.5 - 1.0

In case of foliar feeding as part of a mix with crop protection products, a compatibility test has to be done prior to preparing the spray-mix.

The mentioned indicated dosages and application stages are given as a guideline. Exact dosages, concentration and application stage are subject to local conditions, use of other fertilizers and can only be given after an objective diagnosis.

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Compatible with other fertilizers, with the exception of Calcium fertilizers. Therefore a separate tank is needed or fertilizers should be applied on different times.