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An iron deficiency emerges relatively easy, since iron is proven not to be stable in the root environment or when dissolved in a fertilizer tank. The stability of iron is completely dependent on the pH range in the soil, substrate or water in which it is added. When an incorrect or unsuitable type of iron is added to the plant, it is very likely to precipitate. 

When pH ranges rise above a pH range of 6.5, iron deficiencies often occur. In addition, iron deficiencies are seen in cultivations with a high concentration of  calcium or phosphate. The intake of iron can be obstructed by excess amounts of copper, manganese, magnesium or zinc, which could lead to an iron deficiency. Moreover, factors such as the root temperature and the level of humidity are considered to play a role. Lastly, iron chelates are broken off by UV light, since all organic parts are ‘killed’ by this type of light.

A lack of iron can be recognized when the plant’s young leafs turn light green, yellow or even white . Also, leafs could die. When iron is lacked, the plant can stay behind in terms of root development or overall growth. 

• Discoloration (light green, yellow or white) of young leafs between the nerves
• Slow growth or stop in growth 
• Dying of leafs

Iron and magnesium deficiencies are often confused, since the symptoms are very much alike. Nevertheless, the lack of iron can be recognized in higher parts of the plant.

An iron deficiency is unfavorable and therefore undesired. Fortunately, preventive measures can be taken in order to prevent a plant from developing this deficiency. 

Making use of an iron chelate is crucial. Chelates can be explained as organic elements, that hold a nutrient, in this case iron, like a claw. The iron being and remaining stable in the fertilizer tank and root environment, are seen as a result. The intake of iron is made easier by making use of chelates. 

Besides using chelates, other factors should always be taken into account to optimize the plant’s intake of iron. Closing the lid is considered an important point of interest when preparing the fertilizer tank, so that the negative effects of UV light on iron are prevented. 

Lastly, the pH range should always be taken into account. Especially when not making use of an iron chelate. Not only the pH range in the water is important, also the pH range in the root environment can affect the iron. 

In this article iron deficiencies in plants have been explained by our fertilizer specialists. Excess amounts of iron can also occur in plants, however it is not likely to happen. The intake of manganese can be obstructed by too much iron. 

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