
Iron Deficiency
An iron deficiency is first visible at the top of the plant. Young leaves look as if they have been bleached. The leaves turn yellow, while the veins remain green. This is because iron is an immobile element. What this means is that iron, when fixated, can no longer be distributed in the plant. Eventually, yellowing also occurs in the older leaves and smaller veins. In severe cases, the leaves may even die off.
How do you recognise an iron deficiency?
How do you recognise an iron deficiency?
- At first, you'll see bleaching between the veins in young leaves. The veins themselves remain green.
- Next, larger leaves will also turn yellow and the growth will slow down.
- In severe cases leaves may die off.

What is the (possible) cause?
- Too little iron available in the soil or substrate.
- The pH value of the soil or substrate is too high.
- Too much zinc or manganese in the soil or substrate.
- Too much light on the nutrient tank. This can cause algae to grow in your nutrient solution.
- The substrate is too wet. This stagnates the oxygen supply.
- The root of your plant system functions poorly. This can be due to diseases, damage or low temperature.