Iron (Fe) is an essential element for plants. Since the 1960s, the only way to guarantee iron uptake in soil-
less cultures was through organic binding, i.e. chelates. But Prayon has now developed micronutri Fe, an
alternative, innovative fertilizer that guarantees iron uptake in soilless cultures.
Micronutri Fe is a patented combination of multiple polyphosphates and iron.
Efficient iron fertilizer
• Guaranteed iron uptake, even in the presence
of fluctuating pH levels
• A pure water-soluble iron fertilizer containing only
nutrients: iron, phosphate and potassium
• Less chlorosis, as proven in multiple trials
• Greater efficiency in the presence of UV disinfection
due to enhanced transmission and less deterioration
• Iron availability is reversible when the pH level
fluctuates and/or is corrected
• Easy to use via a separate C tank
• Polyphosphates mean less precipitation in the
irrigation system and better phosphate uptake
Proven in tests in 2012 and 2013
Research carried out previously by Prayon’s R&D department showed that micronutri
Fe can retain the iron within a nutrient solution. The next step was to test iron uptake.
The first trials on cucumbers - conducted in early 2012 in collaboration with Wage-
ningen UR (led by researcher Wim Voogt) - immediately confirmed the potential of
micronutri Fe. Iron uptake was tested in various pH ranges in a pure hydroponic system
(no substrate). Cucumbers are quick to reveal iron deficiency. The results showed that
micronutri Fe, tested alongside a conventional chelate, efficiently makes iron available
to plants in a hydroponic system. Moreover, less tipburn was observed when using
In August 2012 a soilless trial on
cucumbers was launched at Wa-
geningen UR. Less chlorosis was observed with micronutri Fe; the
plants were greener. The harvest proceeded normally and good harvest
results were achieved.
In 2013 we ran a full soilless trial on tomatoes in the Hoogstraten
Research Center. No chlorosis was observed throughout the
entire year. Further confirmation that micronutri Fe is the
perfect iron fertilizer.
In 2013 a soilless trial on strawberries in Hoogstraten
proved that micronutri Fe could easily be used as an iron
fertilizer. Once again good results were achieved. There
was no chlorosis and the harvest proceeded perfectly!
• Less chlorosis
• Efficient and proven iron uptake
• Good harvests
0–42–47 + 2.8% Fe