Cucumber leaves turn yellow: what is the cause of the problem and how to solve it

  • Mar 04, 2021
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Good afternoon, my reader. If the cucumbers develop favorably, their leaves will be dark green. But if the edges of the leaves begin to turn yellow, then the gardener made certain mistakes in the care. In addition, this problem can be caused by various cultural diseases.

 Cucumbers. Illustration for this article is used under a standard license © ofazende.com
Cucumbers. Illustration for this article is used under a standard license © ofazende.com
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Possible causes of leaf discoloration

From the list of possible causes of yellowing of the edges of the leaves, it is necessary to identify the most probable one and begin the fight against the problem, starting from its pathogen. The most common causes of foliage changes include:

  1. Failure to comply with the optimal watering regime. Watering the culture under study is considered favorable if the soil on which the cucumbers grow is moistened to a depth of about 10 cm. If you break this rule and water the plants occasionally or too often, but with insufficient water, the gardener will find yellowed edges on the leaves. If the required watering depth is exceeded, rot may appear on the root system of the cucumbers, which will also greatly harm the culture.
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  2. Lack of nutrients in the soil. When the growing season begins, this crop needs frequent feeding. If no nitrogen fertilizer is applied, the plant will look sickly and its leaves may turn yellow.
  3. Hypothermia. Cucumbers do not tolerate too low ambient temperatures and respond to this assumption with problems with leaves. It is not recommended to grow this thermophilic crop outside the greenhouse.
  4. Burns caused by direct sunlight. There is no need to water the crop during the day, when the sun is most dangerous for plants. If water drops fall on the foliage of cucumbers, the gardener after a while will find burns in moist areas, yellow or brown spots.
  5. Diseases causing discoloration of leaves. Fusarium is the most common infection causing this problem.
  1. Root system problems. If you carelessly handle the roots during transplanting, and they are damaged, or they are attacked by pests, this will affect the state of the leaves.
Cucumbers. Illustration for this article is used under a standard license © ofazende.com

When the cause of the problem is identified, it is time to correct the mistakes and return the foliage to the usual color. To restore the dark green hue if the cucumbers are growing in the greenhouse, do the following:

  1. Establish an irrigation regime. When the plant is blooming and bearing fruit, you need to adhere to the frequency of watering every 2-3 days.
  2. Create a favorable temperature in the greenhouse. During the flowering period, cucumbers will be comfortable at + 20-24 ° С, and when fruits begin to appear, the temperature is increased to + 23-26 ° С.
  3. Ventilate the greenhouse periodically.
  4. Fertilize regularly. If the reason for the yellowing of the leaves is a lack of nutrients, it is worth applying a complex fertilizer, the tops will return to their usual state and turn dark green again.
  5. Observe the required distances when placing cucumbers in open ground, do not thicken the plantings.

If you have grown cucumbers in the open field and are faced with such a problem, you need to take the following measures:

  1. If it gets cold outside, cover the plantings.
  2. Observe the regime of crop moistening identical to greenhouse irrigation. It is important to water the cucumbers in the afternoon or evening, when the scorching sun cannot burn the leaves.
  3. Introduce nutrients into the soil. A good feeding option is organic and complex fertilizers.
Without hesitation and hesitation, finding the cause of the problem and dealing with it, you will return the tops of their usual attractive appearance. The crop will look healthy and yield good yields.

Do you know why cucumber leaves turn yellow?

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