Foliar Greenhouse fertigation Open field fertigation

Van Iperen Potassium Phosphite 50% Liquid contains a high level of Phosphate (30% w/w) in Phosphite form. It is a good P-source that also increases general plant vitality and resistance to stress. Developed to fertigate in soil grown covered crops and hydroponics as well as for foliar application. Also suitable for dipping plant roots prior to transplanting. Produced in our own plant Euroliquids.

  • Transparent liquid solution of high purity
  • Improves general plant immune system
  • Enhances root growth
Foliar Greenhouse fertigation Open field fertigation
  • Production process certified according to ISO 9001:2015
  • Highly concentrated solution
  • Low on Sodium and Chloride
  • Low on heavy metals

Fertigation

Crop Application date Min L/ha/season Max L/ha/season
Vegetables
4 - 6 applications:
• As of plant establishment
• Until fruit colouring
• 7 - 10 days interval
8 10
Flowers
2 - 3 applications:
• As of plant establishment
• 7 - 10 days interval
8 10
Strawberry
4 - 6 applications:
• As of plant establishment
• Until fruit colouring
• 7 - 10 days interval
8 10
Crops on organic subststrate 4 - 6 applications:
• During entire fertigation program
• 7 - 10 days interval
8 10
Crops on rockwhool 2 - 4 applications:
• During plant establishment
• During fruit filling
• 7 - 10 days interval
3 5

Foliar Application

Crop Application date Min L / ha / appl Max L / ha / appl Conc. % (w/v))
Fruit trees
2 - 3 applications:
• As of end of flowering
• Until fruit setting
• 7 - 10 days interval
2.0 2.5 0.1 - 0.2
Citrus
3 applications:
• Spring application
• Summer application
1.5 2.0 0.1 - 0.2
Potato
3 - 4 applications:
• As of tuber setting
• 7 - 10 days interval
3.0 4.0 0.2 - 0.5
Strawberry
2 - 3 applications:
• As of end of flowering
• Until fruit setting
2.5 3.5 0.1 - 0.2
Tomato
• As of plant establishment
• Until fruit setting
2.5 3.5 0.2 - 0.5
Vineyards
3 - 4 applications:
• As of end of flowering
• Until bunch closing
• 7 - 10 days interval
2.5 3.5 0.1 - 0.2

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.

Dipping of plantroots

Dip the naked roots of young plants in Van Iperen Potassium Phosphite 50% Liquid just before planting. It makes the plant stronger and will result in increased initial growth just after planting, the most critical period of the entire crop.

Plants should be dipped 20 - 25 minutes until the heart of the leaves in a 0.5% concentration.

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.

Fertilizing Knowledge

We produce innovative Liquid fertilizers

Our sister company Euroliquids, conveniently located in the port of Rotterdam, is the largest liquid fertilizer factory in Northern Europe. This is where we produce our high quality liquid fertilizers and work on developing innovative new recipes.

Find out more