We fix mistakes in growing tomatoes: why tomatoes do not grow in a greenhouse and what to do about it

One of the most common crops grown by gardeners is tomatoes. However, even experienced summer residents often ask themselves: why do not tomatoes grow in the greenhouse? There are many reasons for this, from improper plant transplantation to the degeneration of the variety.

From the article you will learn what factors affect the cultivation of tomatoes and how to eliminate the main mistakes of farmers.

Why tomatoes do not grow - possible reasons

Let's consider the main reasons for the lack of fruiting and growth of tomatoes. In most cases, this happens due to a combination of several factors at once.

Wrong pick

A prerequisite for strong seedlings is picking. With this procedure, plants build up a powerful root system and take root better when planted in a permanent place. To carry out a dive, a specially sharpened stick is required, which is called a "pique".

Common mistakes at this stage are the deepening of the seedlings above the growing point, the lack of disinfection, which does not allow the seedlings to cope with bacteria on their own.

Untimely and incorrect watering

If you do not comply with the conditions glaze, seedlings will also grow poorly.

Excessive watering can cause it to rot. At the same time, when setting fruits, the soil should not be allowed to dry out, as this leads to shedding of flowers, which will reduce the amount of ovary. The moisture percentage should be 75%.

We fix mistakes in growing tomatoes: why tomatoes do not grow in a greenhouse and what to do about it

Insufficient carbon nutrition

Important feed plants during the period of enhanced photosynthesis, when it is hot in the greenhouse for a long time, and the weather is sunny outside. If this is not done, in the future this will negatively affect their growth and fruit setting.

Violation of the temperature regime in the greenhouse

Tomatoes will not grow well if the greenhouse temperature is less than + 15 ° C and more than + 28 ° C. In this case, pollen maturation slows down and a bountiful harvest will be threatened. Therefore, an important nuance is compliance with the temperature regime.

Lack of nutrition

We fix mistakes in growing tomatoes: why tomatoes do not grow in a greenhouse and what to do about it

Many gardeners are unable to grow tomato fruits due to insufficient nutrition. When growing, do not forget that tomatoes are demanding on fertilizing.

At the same time, it is impossible to exceed the norm: for example, an excessive nitrogen content causes an increased growth of vegetative mass, which has a bad effect on yield.

Soil with a low copper content and a large amount of organic matter provokes the appearance of chlorosis on the leaves.

Attention! The lack of sulfur in the soil leads to yellowing of the leaves.

Degeneration of grade

Some gardeners, when growing tomatoes, prefer one variety, planting it every year. For example, due to large fruits or for other reasons. As a result, summer residents have to face a deterioration in the variety of plants - a change in the best properties of the variety in the negative direction.

Diseases and pests

Slow growth of seedlings is often associated with disease. The main ones are:

  1. Late blight... Fungal damage to the plant, which can be stopped by treatment with "Trichodermin" (20 days after planting).
  2. Septoriasis... This is also a fungal disease, which will help to cope with the solution of "Fitodoctor" (20 ml is diluted in 10 liters of water), which is sprayed with seedlings after straining.
  3. Powdery mildew... Leaf mold, which can be fought with solutions of biofugicides. The treatment is repeated every 10-12 days.

Pests can also damage tomatoes. Especially dangerous:

  1. Whitefly... You can eliminate it by treating the bushes with the "Confidor" tool.
  2. Medvedka... Gnaws through plant roots. Disappears after treatment with the preparation "Thunder" or infusion of hot pepper, vinegar solution.
  3. Wireworm... Treatment with the drug "Bazudin" and liming of acidic soils will help.

High air humidity

In many cases, the cause of a bad ovary lies in the lack of air humidity. As a result, the harvest will be small, since there is no ovary on the first two clusters. If you close all windows and doors in the greenhouse and neglect ventilation, the crop will be irreparably damaged.

Restoring optimal conditions

To restore optimal conditions, proper transplanting and picking, sufficient watering and plant nutrition, as well as maintaining the temperature regime are needed.

Wrong pick or transplant

We fix mistakes in growing tomatoes: why tomatoes do not grow in a greenhouse and what to do about it

After sprouting crops, be sure to separate the planting material - it is necessary to reject weak and thin seedlings... In this case, use a special spatula that will keep the root system from damage. Before performing these actions, it is advisable to water the plants well and wait 20 minutes.

To properly grow seedlings, you will need a light, poor chemical soil. For these purposes, peat is used, to which a small amount of ash is added, which reduces the acidity of the soil.

A pick is carried out when the second true leaf appears. The seedling is deepened to the cotyledons, and an oversized root is shortened by 1/3.

Untimely and incorrect watering

What to do to achieve the desired result? Do not overmoisten the soil, as this can lead to decay of the root system.

Attention! Excessive humidity along with a lack of nitrogen can lead to yellowing of foliage.

Insufficient carbon nutrition

The air needs to be saturated with carbon. This is especially necessary when humus and manure were introduced into the soil in insufficient quantities. Therefore, a container is placed in the greenhouse where manure will ferment. Half of it is filled with manure (in the absence of it, grass), the rest is filled with water.

Such feeding will significantly increase the resistance of plants to extreme conditions, especially during periods of extreme heat.

Violation of the temperature regime in the greenhouse

In order for the flowers to pollinate normally, to form an ovary, be sure to maintain the optimum temperature:

  1. If the weather is sunny, then the temperature should be within 24 ° C.
  2. In cloudy weather, this figure can be at 22 ° C.
  3. At night, the optimum temperature should be within 18 ° C.

To get a generous harvest during the period of fruit ovary, you need to create favorable conditions involving low air humidity.

Lack of nutrition

If the seedling grows weak, with a thin stem, then it does not have enough nitrogen. In some cases, a purple-scarlet hue appears on the lower part of the leaves, indicating that the seedling does not have enough phosphorus. If you find these symptoms, you need to feed the tomatoes.

Saplings stop growing even with a lack of iron. In this case, the bush begins to turn yellow. The way out of the situation is to stop highlighting the seedlings. Also, tomatoes must be removed from the light source. If the case is severe, fertilizing is carried out and the plants are sprayed with iron-containing compounds.

Degeneration of grade

To prevent degeneration, agronomists advise renewing tomato varieties every three years. If you adhere to these recommendations, you will increase yields and will receive large and juicy tomatoes every season.

Diseases and pests

If the seedlings grow poorly due to diseases, it is necessary to immediately begin treatment. In addition to the methods already described by us, consider the following recommendations:

  1. Transplanting into fresh soil will help save seedlings. Before performing these actions, the roots of the plant must be washed with a solution of potassium permanganate or "Fitosporin"
  2. Fungal infection can result from poor watering and low light - carefully monitor the conditions in which your future crop grows.
  3. Loosening and watering will help solution potassium permanganate.

To get rid of pests, in addition to the methods already described, you can use mulching. In this case, you need to have urea-impregnated materials available, such as straw and sawdust.

High air humidity

We fix mistakes in growing tomatoes: why tomatoes do not grow in a greenhouse and what to do about it

When growing tomato seedlings, keep the greenhouse at the optimum temperature. Without fail, a polycarbonate greenhouse must be equipped with large vents in the roof. This will make it possible to eliminate excessive humidity.

If the weather is hot, you need to pay sufficient attention to creating optimal conditions for pollination of flowers. For this purpose, the glass of the greenhouse should be sprinkled with a weak chalk solution.

Tips & Tricks

Correct and timely care is the key to a rich harvest. Gardeners with many years of experience recommend not watering the plants in the first days of planting, but only after ten days.

You can get a bountiful harvest by maintaining the optimum temperature. For this, the greenhouse is constantly ventilated. This is done two hours after watering. On the fourth day after planting the seedlings, the tomatoes are tied up with the tomatoes. To exclude plant diseases, they must be pinned. Such actions will exclude damage to tall bushes that sag under the weight of their weight.

Attention! Linear or frame trellises are great for garters.


When growing tomato crops in a greenhouse, gardeners have to deal with slow growth of bushes or cessation of their development. Similar phenomena arise from insufficient soil nutrition, improper watering and feeding. It is required to find out in a timely manner the reason for stopping the development of seedlings and follow the advice of experienced gardeners.

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