Gardening

How to fight against ferric chlorosis?


Nitrogen, phosphorus, calcium, iron… Plants need nutrients to develop. If their leaves turn yellow, it could be because of a deficiency!

Find out how to avoid ferric chlorosis and the natural treatments to fight it.

Read also :

  • Chlorosis: symptoms and treatments

What is iron chlorosis?

Chlorosis means a deficiency for a plant. As such, there are different chloroses that affect multiple plants. Ferric chlorosis is a lack of iron. Either way, it is a real lack of iron in the soil. Either the plant, for various reasons, cannot assimilate the iron present in the soil. While nitrogen, phosphorus and potassium are often referred to as the three essential elements for plant development, we must not forget iron! Indeed, this micronutrient enters into the composition of the green pigment necessary for chlorophyll. Plants need it in very small quantities, but it is still essential.

Which plants are affected by iron chlorosis?

Vines, peaches, pear trees, roses, currants and citrus fruits are susceptible to this deficiency. This is also the case with heather earth plants which are used to growing in acidic soil. If they are grown in too basic soil, the iron will not be able to be properly absorbed.

What are the symptoms ?

  • The leaves are thinning and turn yellow but the veins remain green
  • The plant is withered, it does not develop well
  • Some leaves necrotize and fall

Prevent the onset of iron chlorosis

First of all, it is important to understand the origin of the problem. This deficiency occurs because of:

  • Too wet or too dry soil that prevents iron assimilation
  • A limestone land
  • Soil naturally low in iron

If your land is heavy and waterlogged, you will have to work your land to lighten it, especially with sand additions. A soil that is too dry, on the other hand, will benefit from being mulched and enriched. For roses and fruit trees, use a rootstock that grows in limestone soil. If your land is limestone, choose suitable plants, they will be all the more beautiful. Do you love heather earth plants? Prefer a pot plantation. For potted plants, consider giving them regular natural fertilizers. Indeed, if you do not provide them with the nutrients present in the soil and are not renewed as in the soil, then you have to do it yourself. If your soil is naturally low in iron, then it will need to be enriched through natural treatments. We forget about iron sulphate which is not authorized in organic farming. In addition, it is irritating to the respiratory tract, eyes and skin.

Natural treatments

Nettle manure:

Nettle manure is an explosive cocktail of nutrients. It enriches the soil with nitrogen but also with iron! Get into the habit of using it for watering once or twice a month at the foot of plants prone to chlorosis. Dilute it 10-20% in rainwater, it will also promote the growth of your plants. This natural anti-chlorosis agent also has the advantage of repelling harmful insects, if it is sprayed on plants.

Iron chelates:

These molecules trap iron and make it assimilable by plants. This treatment works as an iron supply which will quickly make the leaves green again. It is effective but nevertheless quite ephemeral. It can save a deficient plant, but it will be necessary to think about finding the origin of the problem in order to be able to treat it at the source.

Video: Soymasters - Managing Iron Deficiency Chlorosis (October 2020).