Tomato leaves with chlorosis: signs and treatment

Chlorosis is a disease that occurs when certain trace elements are deficient. Perhaps the development of such a disease in tomatoes. Tomato leaves during chlorosis change color and turn yellow.

  1. Causes of chlorosis
  2. Signs of the disease
  3. Iron
  4. Magnesium
  5. Manganese
  6. Zinc
  7. Potassium
  8. Prevention of the disease
  9. Treatment
  10. Conclusion

This disease will not lead to the death of tomatoes, but they will be weak and get a good harvest from them will fail but using simple transforms Effective measures can be taken to avoid this disease, and if it occurs, it can be cured.

Causes of chlorosis

Yellowing of the leaves in tomatoes indicates that something is developing It went wrong. Often the cause of this process is chlorosis. This disease is characteristic of many plants, both garden and indoor.

The main reason for the occurrence of chlorosis in tomatoes is a deficiency of trace elements. Depending on which element is lacking, plants are distinguished:

  • iron;
  • magnesium;
  • manganese;
  • zinc;
  • potash;
  • molybdenum;

All these elements are present in small quantities in the soil, sometimes they are not enough to the bushes, or their absorption is impaired.

In non-infectious chlorosis, only iron deficiency is called agronomy. Everything else is simply a deficit of one or another element. The definition of this deficiency by changing the color, size and shape of the leaves is called leaf diagnostics.

Symptoms of the disease

They all have distinctive signs that will help in the correct diagnosis . This will allow intensive treatment of tomato bushes.


Occurs with a lack of iron. The leaf plate turns yellow, the veins remain green. Such a change in pigmentation appears on young leaves, old ones remain green. Such a deficiency occurs in poor soils or in the case of poor iron intake due to heavy soil with a pH above 7.

On alkaline soils, the iron contained in the soil complex becomes insoluble and, therefore inaccessible to plants form. Gardeners often make mistakes when cultivating the soil and make large amounts of lime, which leads to iron deficiency in plants.


Tomato leaves turn yellow on the edge, only their base retains a green color. The outlines of the non-yellowed part of the leaf are in the shape of a triangle. Such a change is characteristic of both young and old leaves. After a while, they begin to fall, the plant becomes weak and has a painful appearance.


In this form, the leaves show a color change between the veins, these parts of the plate become pale light green in color.


При дефиците цинка листь становятся мелкими

With zinc deficiency the leaves become small

Creamy yellowish spots appear on tomato leaves with zinc deficiency. The veins remain green. Young leaves grow small on short and weak cuttings.


If the disease is associated with a deficiency of potassium, then the leaves turn yellow from the end to the base. Over time, they fall off, the young grow smaller, even the stems become weak.

The most important sign of potassium deficiency is the brown border of the leaves, the so-called marginal burn.

Prevention of the disease

To protect tomatoes from chlorosis, preventive measures are taken even before the plants are planted in the soil.

  1. Check the pH, the soil should be with indicators below 7, if it is higher, then the soil is acidified. To do this, dissolve 1 tsp of citric acid in 10 l of water or squeeze one lemon. Spill the soil.
  2. The bed is thoroughly loosened if the soil is heavy and poorly drained, river sand and lowland peat are added.
  3. They introduce complex mineral fertilizers or humates enriched with macroelements into the soil.
  4. During the growth of tomatoes, they regularly loosen the soil, regulate irrigation, and prevent stagnation of water.

All these measures, combined with the right agricultural technology, will help prevent the occurrence of the disease, improve the structure and soil quality, and also help to grow healthy tomatoes with a quality crop. And the tomato bushes will grow well, bloom and bear fruit.


When the disease occurs already during the growth of the bushes, they must be treated. For this, chelated forms of fertilizers are used. They are highly soluble in water and are suitable for spraying bushes. For iron deficiency use:

  • Iron chelate;
  • Ferrovit;
  • Ferillen.

In addition to ready-made preparations chelate to replenish iron at home. 2.5 g of citric acid and 4 g of vitriol are enough for 1 liter of water. This solution is sprayed with bushes 3 times with a frequency of 10 days.

Kalimag, dolomite flour or Magbor will help get rid of magnesium chlorosis. You can also use ash. To do this, prepare an ash solution. One glass of ash is dissolved in 10 l of water and sprayed with bushes on a leaf.

In a situation when a zinc deficiency has occurred, zinc oxide is used to feed tomatoes. A solution is prepared by adding 10 g of fertilizer to 10 water. Bushes are sprayed with finished dressing. You can also use zinc sulfate and superphosphate with zinc to enrich the beds.



The fight against chlorosis will not be difficult, will bring results, but the effectiveness of treatment can only be seen when new leaves begin to grow with the rules th color. Chlorosis can significantly weaken plants, which can affect the quality of the crop. And also weak bushes are sensitive to diseases. Therefore, it is better to take all preventive measures in the spring and protect the tomatoes from this disease.

Anna Evans

Author ✓ Farmer

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