Foliar Greenhouse fertigation Open field fertigation

Van Iperen WS NPKs are top quality blends made from the purest raw materials, with limited caking sensitivity and with high level EDTA-chelated micro-nutrients for fertigation or foliar application. Van Iperen WS NPK | 20 - 20 - 20 + TE is part of our Low pH line. Our Low pH line was developed using specific acid technology that will drop the pH of the final product. This gives the formulation an increased efficiency in alkaline waters thanks to the buffering of bicarbonates with acid, for higher plant assimilation of all elements including micro nutrients.
As Nutrient Use Efficiency remains our main concern at Van Iperen, we try our best to come with adequate solutions for all situations.

  • Improves root and shoot growth, vegetative growth and gives high quality buds and fruits
  • Micronutrients 100% chelated and fully available
  • Developed for fertigation in open field and greenhouses. Also suitable for foliar application
  • Produced in a broad range of intense colours, to distinguish the product and the final solution
Foliar Greenhouse fertigation Open field fertigation
  • Rapidly dissolvable
  • Low on Sodium and Chloride
  • Available in 9 intense colours
  • Production process certified according to ISO 9001:2015
  • Easy to handle, dissolve and apply


Crop Application date Min kg/ha/season Max kg/ha/season
Fruit trees
• As of end of flowering
• Until fruit filling
100 200
• As of vegetative growth 150 250
• As of vegetative growth 150 300
• During entire fertigation program
• Until tuber initiation
100 200
Fruit vegetables
• As of vegetative growth
• Until fruit setting
150 300

Foliar Application

Crop Application date Min kg / ha / appl Max kg / ha / appl Conc. % (w/v))
Arable crops
3 applications:
• As of vegetative growth
• 10 - 14 days interval
3 6 0.5 - 0.8
Stone fruit
2 applications:
• During vegetative growth
• During fruit filling
3 6 0.3 - 0.5
2 - 4 applications:
• As of vegetative growth
• Until flowering starts
5 10 0.3 - 0.5
2 applications:
• During vegetative growth
• During post harvest period
5 10 0.5 - 0.8
3 applications:
• Spring application
• During vegetative growth
• During fruit setting
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. The pH of the tank solution should be above 4.