Greenhouse fertigation

Van Iperen Oligo Iron-DTPA 7% is a pure an highly concentrated liquid Iron fertilizer, free of sodium. Iron DTPA is adviced for hydroponics. Our product is a stable, translucent solution and is recommended at different phenological stages. The high level of Iron in our formula improves the production of chlorophyll.

  • Gives a strong apical zone, free of chlorosis
  • Iron 100% chelated and fully available up to a pH of 7
  • Easy to handle, dissolve and apply
  • Developed for soiless grown crops
  • Recommended in case of recycled water with UV-sterilization
Greenhouse fertigation
  • Rapidly dissolvable
  • Free of Ammonium
  • Patented micro granulation process
  • Raspberry shaped, light brown microgranules


In 1.000 l stock solution Fe in g Fe in mmol
0.1 kg 7 0.13
0.5 kg 35 0.63
1.0 kg 70 1.25
1.5 kg 105 1.88

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Compatible with other fertilizers. The pH of the tank solution should be above 4.

Fertilizing Knowledge

How to choose an Iron chelate?

There are many options to add Iron to your crop. The most efficient way is chelated Iron for its stability, availability for the plant and its easiness to use. But choosing among the different solutions can be a challenge. How to choose? We can help you!

Find out more