Tomato leaves turn yellow: reasons and what to do

Often, gardeners notice that yellowness appears on the leaves of a plant such as tomatoes growing in a greenhouse, which certainly has nothing to do with the changing season. So why do leaves and tomatoes turn yellow in the greenhouse and how to deal with it? After all, if you do not find the problem on time, and even more so. If it is not eliminated, then you can lose the crop.

Causes of yellowing leaves in tomatoes

There are several reasons that can explain why the leaves of a tomato in a greenhouse began to turn yellow:

1. Incorrect watering or non-compliance with the plant. The lack of moisture and its lack for tomatoes are equally fatal. If the soil dries up, then tomatoes need to be provided with moderate watering. If you restore the regime of watering the plant, as well as loosen the beds, then the leaves will quickly gain their healthy appearance.
2. The defeat of the disease. Yellowness of tomato foliage may be a symptom of such diseases characteristic of these cropslike fusarium wilting. It is important to recognize the disease in time and take appropriate measures for the treatment of tomatoes.
3. Lack of trace elements and minerals. Most often, the yellowness of the foliage is a cry for help from the plant, that is, it lacks nutrients for development. When the fruits begin to ripen, it is important not to forget to feed tomatoes with nitrogen fertilizers. Also great plant growth activator, since it contains a lot of nutrients.
4. Damage to the root system of the plant. Damage to the roots can be caused either by an attack of pests, which, unfortunately, is not visible, or damage to the roots when transplanting seedlings in open ground. If the plant was damaged mechanically, then it will direct all forces to form additional roots, so there is not enough energy on the leaves. As soon as these subordinate roots are finally restored, then the color of the leaves normalizes. If the cause of the damage is caused by pests, then without special means against them can not do.
5. High humidity in the greenhouse. In a greenhouse, air humidity should not be more than 70%, otherwise the leaves will not only turn yellow, but also rot.

How to eliminate the yellowness of tomato leaves in a greenhouse

To understand how to deal with yellowed leaves in tomatoes in a greenhouse, it is very important to correctly establish the cause of this phenomenon. But, there are a number of general measures that can be taken as not only eliminating the problem, but also prevention.

For example, even if the problem is lack of fertilizer, or damage to the roots, or lack / excess of moisture, the "first aid" is given to the roots. To do this, loosen the soil at regular intervals. This procedure is recommended to be carried out immediately after watering.

Next, it is necessary to monitor the temperature in the greenhouse so that the humidity level does not go beyond the permissible norm under any circumstances (recall, the humidity in the greenhouse should be from 60 to 70%).

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If the courtyard is hot and dry weather, then the structure must be aired, and water the plants by sprinkling.

Together with the mechanical work of caring for tomatoes, getting rid of weeds, you can also feed tomatoes with mineral fertilizers. If tomatoes have only recently been planted in a greenhouse, and still only take root, then you need to feed them through the leaf mass by spraying.For these purposes, it is necessary to dilute no more than 1% mineral salts in the calculation, and spray the tomatoes in the morning, in cool weather, or at night, if at this time in the summer the temperature remains high.

Important! You can not spray tomatoes in the summer during the daytime, if the sun is shining, this can lead to burns of the leaves!

Preparations and folk methods for eliminating yellowness on the leaves

You can also get rid of the problem of yellow leaves with the help of special preparations. For example, use Epin, which is based on epibrassinolide, or Heteroauxin based on indolyl-3-acetic acid. These drugs stimulate plant growth, and also help build up the root system.

Instead of these drugs, you can try to solve the problem by the alternative method. For example, make an infusion of comfrey leaves. It takes a kilo of plant leaves per 10 liters of water, it takes 5 days to insist on a homemade medicine for tomatoes. When the remedy is infused, it must be mixed with a decoction of comfrey roots. The resulting product is diluted with water in a ratio of 1: 3. You can use it by spraying methods, or by watering the bushes. A bucket of such a solution leaves for three meters of landings.

If you take timely and correct measures so that the leaves stop turning yellow and become healthy again, then you can save the plants, and also count on a good and full-fledged crop.