• Greenhouse fertigation

Agronomical target

  • Nutrition
  • Premium List

Van Iperen Oligo Iron-DTPA 3.1% Liquid is a pure liquid Iron fertilizer. 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
  • Developed for soilless grown crops
  • Recommended in case of recycled water with UV-sterilization


  • Greenhouse fertigation
  • Clear solution
  • Free of Ammonium
  • Dark brown liquid
  • Easy to handle and apply


In 1.000 l stock solution Fe in g Fe in mmol
1.0 L 42 0.75
5.0 L 210 3.8
10.0 L 420 7.5
15.0 L 630 11.3

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.

Other Dosage

For foliar application you can choose between EDTA and IDHA. EDTA can also be used for open field fertigation in case of soils up to a pH of 6. For open field fertigation in alkaline soils you can choose between EDDHA and HBED. For high-tech soilless greenhouse, DTPA is your best choice.

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.

Preparing your downloads, please wait...

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