Why tomatoes wilt and leaves curl. Why do the top leaves of a tomato curl? Why do the top leaves of tomatoes curl inward?

This year, some summer residents are faced with a situation that upper leaves Many of the tomatoes planted in the greenhouse suddenly begin to curl for no apparent reason. The problem is mainly noticed in indeterminate varieties and hybrids. Moreover, the tops do not curl on all of them, but only on some bushes.

Dry and hot weather

It is important to note that, as expected, brushes are formed below, and little by little the ovaries appear. That is, there seems to be no problem at all, and the advice for immediate uprooting due to the risk of spreading the virus is reasonably perceived with hostility by many summer residents. So much work and time is put in, everything blooms, starts to bloom, and then suddenly it’s uprooted. No, it won't!

In my opinion, one of the logical explanations for what is happening is not the virus at all, but the hot and dry May and the beginning of summer. There is almost no rain, several temperature records have been broken. As a result, the bushes, taking into account timely watering, develop faster above the ground than underground. The delayed root system does not have time to provide the plant with everything it needs and, as a rule, this deficiency is reflected precisely in the upper part.

In addition, the complaints intensified by the beginning of the second ten days of June, when the lower clusters began to actively bloom and gradually set fruit. Tomatoes, like most other plants, spend much more resources on everything related to reproduction. This means that even less moisture, nutrients, and important macro- and microelements will reach the upper tiers.

Skew in feeding

Pay attention to one more important point. As you know, in the phase of active growth of vegetative mass, tomatoes require nitrogen. But this macroelement partially impairs the absorption of another important macroelement - potassium. The latter has a direct effect on the normal development of the vascular system.

Conclusion: if during fertilizing there was a bias towards nitrogen (there are not only mineral fertilizers, but also infusions of mullein and chicken manure, watering with green fertilizer from infused weeds, initial filling of warm beds), then due to poor vessels, sap flow worsens, and it is the tops that suffer first.

The way out of the situation: feed with potassium humate strictly according to the instructions, completely eliminating nitrogen. This fertilizer is perfectly absorbed through the leaf apparatus, so use a spray bottle for spraying. As long as it is dry and hot, spraying on the leaves will not provoke fungal diseases. Wood ash is not suitable as a source of potassium in this case, since it does not start working immediately.

You can use potassium sulfate and potassium monophosphate, which are in the arsenal of almost every summer resident.

In some cases, curling can be caused by a lack of microelements: boron, zinc, magnesium. But plants need them in microdoses, so be careful with fertilizing in this case. ABOUT boric acid I recently wrote, you will find the link in similar materials.

By all indications, tomato plants in a greenhouse are “fatten” from excess nitrogen fertilizers in the soil.

In this case, tomatoes expel a large green mass, but do not strive to produce offspring, since they do not feel any danger to their lives. That is, they form very weak flower clusters with a small number of flowers.

Feeding will help balance the nutrition of tomatoes and correct the situation in this case. mineral fertilizers, which include phosphorus, potassium, zinc, boron and other trace elements.

Superphosphate is ideal for this (dissolve 3 tablespoons in 10 liters of water and feed 1 liter per bush).

But it is best to use an infusion of wood ash as a top dressing; it contains all the nutrients except nitrogen.

Curling of the apical leaves can also occur for other reasons:

• From high temperatures in the greenhouse (more than +35°C). In this case, the apical leaves curl by lunchtime, and by night or in the morning the leaf blades are restored. It is necessary to ventilate the greenhouse more often and shade the roof nonwoven materials(span-bond, lutrasil, agril and others).
• From a large difference in night and day temperatures. In this case, the greenhouses are closed at night and opened during the day for good ventilation.
• From frequent but shallow watering of plants. It is better to water tomatoes less often, but more abundantly.
• From belated removal large quantities overgrown stepsons and excessive pruning of leaves, as the balance between the above-ground part of the plant and the roots is disrupted. Stepchildren need to be cut when the stepsons are no more than 5-7 cm long. It is permissible to cut 2-3 leaves on a plant per week.
• From damage by viruses or pests. A plant infected with a virus cannot be cured. The fruits from such plants can be used for food, but the seeds cannot be collected.
• Aphids and whiteflies can deform young leaves. In this case, immediately treat the plants with one of the insecticides (Agrolan, Actellik, etc.).

Preparation of ash fertilizer
Pour 2 liters of wood ash hot water and mix thoroughly. Bring the solution to 10 liters with water and leave for 24 hours until all elements are completely dissolved. To obtain liquid fertilizer, take 1 liter of infusion, dilute it in 9 liters of water heated in the sun, and apply 1 liter at the root of each plant.

Below are other entries on the topic “Do-it-yourself cottage and garden”

To successfully grow tomatoes, it is necessary not only to properly prepare the seeds and grow seedlings, but also to properly care for the tomato bushes in the greenhouse (or in the ground). Tomato bushes are susceptible to temperature fluctuations, dampness, heat, and diseases.

But it is impossible to foresee everything - it also happens that healthy and strong bushes begin to dry out right from the top. For an explanation of why tomato leaves curl at the top, read our article.

It must be said that tomato bushes quickly react to unfavorable conditions. This can manifest itself in drying out and wilting of green vines. When tomato leaves begin to curl, it is difficult for the plant to get enough sunlight, which will certainly affect the quality and quantity of fruits.

The curling of leaves is just a consequence. The reasons could be anything:

• overfeeding or underfeeding with mineral and organic substances;
• improper or irregular watering;
• unsuitable microclimate for tomatoes in the greenhouse;
• incorrect planting of bushes;
• infection by bacteria, viruses;
• attack of insect pests.

Irrigation errors

Each plant adapts to current conditions. When there is not enough moisture, the bushes begin to save life-giving moisture, and accordingly, not all plant organs receive it. The leaves begin to curl so that less water evaporates from their surface. Infrequent watering conducts moisture only to the upper layers of the soil, while the lower layers do not receive it at all.

Make sure that the water does not spread over the entire ridge; for this, an earthen roller is usually made around each bush.

Watering should be very plentiful, especially if you are growing tomatoes in clay soil. In this case, frequent watering must be carried out in conjunction with measures to remove excess moisture from the roots. After all, poor drainage can lead to withering of bushes due to lack of oxygen.

Moreover, when planting bushes in clay soils, you need to prepare holes with loose soil so that the roots receive enough oxygen.

Hot in the greenhouse

At high temperatures in the greenhouse and poor ventilation, sheet plate they strive to evaporate as little moisture as possible, which is why we observe curling. Especially on the upper tiers of the bush, which are closer to the light source.

To prevent this situation, ventilate the greenhouse or greenhouse every day. On very hot days, in many regions, gardeners open greenhouses all night. Thus, circulation in the air will help the foliage and roots maintain normal growth and fruit set. By the way, on especially hot days, for protection from the scorching sun experienced gardeners Shade the bushes using lutrasil or white spandbond.

To prevent the unpleasant effects of heat, you can do the following:

• Dilute urea (1.5 tbsp) in one bucket of warm water. Treat the leaves with this solution (spraying). After a few days, you can water the beds with tomatoes with a slightly pink solution of manganese.
• Mulching is very effective way to retain moisture in the soil. Mulch can be hay, grass, etc. The optimal layer of mulch - 8 cm - will not allow moisture to evaporate, thereby keeping the foliage and plant healthy.
• But what you shouldn’t do is “refresh” the bushes at the very peak of the heat. Don’t be lazy to water your tomatoes in the morning, before the heat starts. Or in the evening, at sunset. Watering in the middle of the day can lead to leaf scorch and late blight.

Bad feeding

Organic substances (rotted grass, manure, ash, etc.) cannot provide the plant with everything it needs to grow. Manure releases a lot of ammonia, which burns the foliage. As a result, it begins to curl and dry out.

An excess of manure is also harmful because the bushes begin to build up green mass, directing all their efforts to this instead of setting fruit. In order not to lose juicy and ripe tomato fruits, feed the bushes only with well-rotted manure or compost. Don't skimp on complex feedings. They are sold in all gardening stores.

To feed the bushes, dissolve a glass of ash in a bucket of water and apply it under each bush. Experienced gardeners use a teaspoon of potassium sulfate, which is also dissolved in a bucket of warm water.

Phosphorus, copper, zinc, calcium, iron and other trace elements are very important for plant health. A lack of these elements can lead not only to yellowing of the leaves, but also to other troubles.

Aphid

These insects, settling on stems and leaves, feed on plant juices. This is why the leaves begin to dry out and curl. It is very difficult to free the bushes from these pests, because insects literally fill the entire usable area plants.

Contracting an infection

If all the methods described above did not help and the leaves still continue to curl, most likely the bushes are infected with some kind of infection. You can buy Aquisill and try to cure the plants. But if this remedy did not help, then nothing will help. Pull out all diseased bushes at the roots, burn them to the ground, and thoroughly disinfect the greenhouse or greenhouse.

Incorrect pinching

Pinching or pinching must be done at a certain time, otherwise there is a risk of exposing the bush to wilting. Young bushes that have reached 8-9 cm can already be pinched. But don’t overdo it; removing too many leaves will disrupt the growing season.

conclusions

Proper care of tomatoes includes not only all the rules for planting and care, but also constant monitoring of the condition of the bushes. So, the reasons for leaf curling on tomato plants are:

• lack or excess of moisture;
• overfeeding or underfeeding;
• aphid infestation;
• incorrect stepsoning;
• contracting an infection

Kira Stoletova

If the top of the tomato begins to wither or curl, you should immediately determine what exactly is causing the plant discomfort.

Causes of the problem

Tomatoes immediately react to unsuitable conditions for growth and development. There are many reasons why the tops curl. Let's look at the most common ones:

• Damage to roots during planting. A plant with a pruned system quickly weakens. Root pruning is not so bad because the roots will regenerate and the leaves will come back to life.
• Incorrect or insufficient fertilizing. Tomatoes need constant feeding. Once every 2 weeks you need to apply fertilizer both in the greenhouse and on open area. Often the tops of tomatoes curl from an excess of organic matter. If you add a lot of manure or compost, the plant begins to give all the fertilizer to the green parts, forgetting about the fruits. Also, from insufficiently rotted manure, the plant begins to wither.
• Very high temperature. At high temperatures, seedlings in a greenhouse begin to lose their attractiveness. appearance. The upper leaves stop growing and begin to curl. To prevent this from happening, there must be air circulation in the greenhouse. To protect the plant, you can use a urea solution. For it take 1.5 tbsp. l. urea and 10 liters of water. Leaves are treated with this product. You can also mulch. An 8-centimeter layer of grass will help the roots not to overheat.
• The plant does not receive enough light, and the process of photosynthesis slows down. This has a bad effect on the growth and development of vegetable crops.
• Improper watering of tomatoes. Due to lack of moisture, tomato leaves begin to curl even with the top cut off. So they try to retain water in themselves. For proper watering you need to take 1 bucket of water for 1 bush. It is necessary to water in several approaches, because if you pour in all the water at once, it will spread without ever reaching the roots of the vegetable.
• Curling the tops of tomatoes provokes aphids and various bacterial infections. They must be combated immediately after detection to prevent the death of the plant.
  It is important not to overdo it when watering the plant: from an excess of moisture, the tops of the bushes also begin to turn yellow and curl. If tomatoes are planted in an area where there is constant moisture, you need to make channels to drain the water.

  One of possible reasons Crushing and curling of the upper leaves on tomatoes are caused by viral diseases, such as aspermia. To understand the nature of the disease, you need to remember that all fungal and bacterial diseases begin with lower leaves, and viral ones - from the top.

Tomato leaves can become curled due to damage from various pests.

Some of the most common pests are aphids and whiteflies. They need to be dealt with as soon as possible to prevent serious diseases.

Aphid

It hides under the leaves and feeds on their juice, which sometimes leads not only to curling of the tops, but also to a change in the shape of the stem.

To combat aphids, both chemicals and traditional methods. It all depends on the area of ​​damage and the period of development of the tomatoes.

Tatyana Orlova (candidate of agricultural sciences):

Per season at favorable conditions aphids can produce up to 10-12 generations! Therefore, do not think that by getting rid of aphids at the beginning of summer, you have solved the problem forever. Watch for winged aphids on your plants. Their appearance indicates that the aphids have begun to spread again.

Chemicals

It is necessary to treat crops against aphids with chemicals with extreme caution, since they are completely removed from tomatoes after 25-30 days, so fruits that have almost reached maturity must be picked and placed in a dark room until fully ripe.

To combat the pest, you can use insecticides such as:

• "Akarin." For spraying, take 8 ml of the drug and 1 liter of water.
• "Biotlin." It is used to kill adults. The drug also prevents the reproduction of aphids. For treatment, use 5 ml of insecticide per 10 liters of water.
• "Spark". A potent drug. It fights not only aphids, but also other pests. For the solution, use 1 tablet of the drug per 10 liters of water.

In addition to chemicals, there are biological drugs, which can be used 2 days before harvesting the fruits. Such preparations are Fitoverm and Actofit. An ampoule of the drug (4-6 ml) is diluted in 1 liter of water and the plants are treated with it.

All chemicals are used according to instructions and at a temperature not lower than 16°C. If it is lower, the drug does not work.

Tatyana Orlova (candidate of agricultural sciences):

Heat also negatively affects the effectiveness of the prepared drug. As a rule, all chemical protective agents are prepared using water based. High air temperature promotes rapid evaporation of the substance. The drug simply won’t even have time to work. Therefore, it is recommended to use plant protection products in the morning and evening hours, when the air temperature is below +25 degrees.

Everything in the greenhouse chemical treatments must be carried out with extreme caution, in special clothing, the greenhouse after treatment is left open overnight.

Traditional methods

As an alternative chemicals Traditional methods are used to combat aphids. A good remedy is a soap solution. To prepare it you need:

• grate the block laundry soap;
• dissolve it in a small amount of water;
• pour the finished mixture into 10 liters of water;
• add 1 liter of water with boiled and strained ash.

Tomato leaves are treated with this product, not forgetting their lower part.

Soap foam, which is used to wash damaged leaves, also helps in the fight against aphids. You can also try to kill pests by washing them off with a strong stream of water.

Aphids do not tolerate garlic solution. To prepare it, use 3 cloves of garlic and 0.5 tbsp. water. This product is infused for 3 days, after which it is filtered, added to 1 bucket of water and the culture is treated.

Folk remedies will be beneficial if used regularly: once every 7-10 days.

Prevention

To prevent the appearance of aphids, you need to dig up 10-15 cm of soil in the fall after harvesting. For the winter, it is not leveled, but left loosened.

In the spring, the area allocated for tomatoes is treated with fufanon solution. To prepare it, take 60 g of the drug and dilute it in 10 liters of water.

No less important is correct scheme planting tomato seedlings. It is necessary to take into account the distance between the bushes. It should not be less than 30 cm in a row and 70 cm between rows.

Near the area with tomatoes, anthills are destroyed so that the ants do not transfer aphids to the seedlings.

Tatyana Orlova (candidate of agricultural sciences):

Unfortunately, it is not possible to completely and permanently remove ants from your site. They leave one place and migrate to another. But to control their numbers, use the drugs Muracid and Medvetox in the form of granules. Several granules of these drugs are placed in the passages of the anthill and behind a short time ants disappear in it

Whitefly

The leaves begin to curl due to whitefly infestation. She, like aphids, hides under tomato leaves. Adults are more harmful than larvae. If the quantity is small, the damaged leaves are torn off, but this is not a very effective method.

To completely get rid of this pest, use the following chemicals, How.

Curling of leaves in tomatoes is common problem when growing crops in greenhouses. In open ground, such a nuisance is less common. .

Causes of leaf curling

The main reasons are

1. It's too hot in the greenhouse.
2. Tomatoes lack moisture.
3. Lack of batteries.
4. Excess fertilizer.
5. Damage to roots when planting seedlings or subsequent care of tomatoes.
6. Untimely removal of stepchildren. Leaves also curl when too many shoots are removed at once.
7. Pests sometimes also cause tomato leaves to curl.
8. Features of the variety.

Depending on the reason, the leaves curl either upward in a boat or downward in the shape of a chicken's foot.

reason 1. Temperature

In a greenhouse, the temperature is always at least 5-7°C higher than outside, even if the doors and windows are open. Therefore, when the temperature in the greenhouse is above 27-28° and there is low air circulation, the leaves are curled into a tube to avoid excessive evaporation of moisture. At night, when the heat subsides, they straighten out again.

Very often the leaves curl due to high temperatures.

What to do

To prevent leaves from curling in hot weather, greenhouses are left open at night. To reduce the temperature, the greenhouse is shaded. There should be constant air circulation inside it. Even in cold weather it must be ventilated.

reason 2. Lack of moisture

At insufficient watering, especially in the heat (and in greenhouses these factors are inextricably linked), tomatoes also reduce the area of ​​evaporation due to curling of the leaves.

• It is recommended to water tomatoes in greenhouses at a temperature of 16-20°C once every 7-10 days.
• At a temperature of 20-25°C once every 5 days
• At a temperature of 25-30°C every other day
• Over 30°C - daily, but very moderately.

This only applies to greenhouse plants, for open ground This watering regime is not suitable, since the tomatoes are additionally watered with precipitation. When choosing a watering regime, you should always take into account the growing conditions on your site.

If the leaves of tomatoes are curled, then the first thing to do is ventilate the greenhouse and water the crop.

You should not immediately water the plants abundantly. It is better to water in small volumes over several days. It is especially necessary to observe this regime during the fruiting period.

reason 3. Lack of batteries

If neither watering nor airing helped, and the leaves remain curled, then the problem is more serious than expected: the plants. Leaves curl differently depending on which element is deficient.

Phosphorus deficiency

The leaves curl upward and turn purple on the underside. Phosphorus is a macronutrient, and tomatoes consume it in large quantities.

To replenish phosphorus deficiency, the crop is watered with an extract of superphosphate. To prepare it, pour 1 cup of fertilizer into 1 liter of boiling water (otherwise it will not dissolve) and leave for 12-18 hours, stirring regularly. The finished extract is diluted with water to 10 liters and watered at the roots of the tomatoes. The application rate is 0.5 liters per bush.

You can add ash or superphosphate in dry form, but then you will have to wait 7-10 days longer for the effect.

Tomatoes need to be fed with phosphorus.

Copper deficiency

A deficiency of the element is much less common (especially when tomatoes are treated with copper-containing drugs for diseases), but its deficiency is not as rare as one might assume. With a lack of copper, the edges of the leaves curl upward. Yellow blurry spots appear on the leaves, which turn black in case of acute deficiency.

There are many spots and they are located randomly over the entire leaf surface. The leaf appears healthy but yellow and curled. To eliminate the problem, tomatoes are sprayed with any preparations containing copper. You can water the bushes with the same solution.

Both spraying and watering not only replenish the microelement deficiency, but also protect tomatoes well from many diseases.

Feeding with microelements is required.

Potassium deficiency

The leaves curl up into a tube and form a brown border along the edges. Tomatoes consume slightly less potassium than phosphorus, so it is advisable to add it with each feeding. In case of severe deficiency, the bushes are fed with any chlorine-free potassium fertilizer.

The best for tomatoes is potassium nitrate, which also contains a small amount of nitrogen. 1 tbsp. l. fertilizers are diluted in 10 liters of water. Watering rate is 0.5 liters per bush.

An excellent fertilizer would be an extract from ash: 100 g of ash is poured with boiling water and left for 24 hours, stirring regularly. Then the solution is filtered and watered at the roots of the tomatoes. The consumption rate is 0.5 l per bush. If spraying is carried out with ash infusion, then 40 g of laundry soap is added to the working solution as an adhesive.

Such bushes require potassium fertilizing.

Nitrogen deficiency

Usually occurs on poor soils and with gross violations in agricultural cultivation techniques. With a lack of nitrogen, the leaves become yellowish and become smaller. As nitrogen starvation increases, the leaves begin to curl down, turn yellow and dry out.

Urgent feeding with any nitrogen mineral fertilizer is necessary. If it is not there, then the tomatoes are fed with manure or herbal infusion. 0.5 liters of infusion are diluted in 10 liters of water and fed to the plants. The application rate is 1 liter per bush.

Pale leaves on tomatoes are due to a lack of nitrogen.

Calcium deficiency

The leaves curl upward. A little earlier, blossom end rot appears on the fruit. Feed the tomatoes with calcium nitrate: 10 g/10 l of water.

And here calcium supplementation is required.

reason 4. Excess fertilizer

Some summer residents, trying to get maximum yield, they apply so much fertilizer (especially organic matter) to tomatoes that the plants begin to suffer from their excess, and this, in turn, very quickly leads to disease.

Excess nitrogen

The leaves at the top of the bush curl, the rest are very powerful and normal in appearance. To neutralize excess nitrogen, stop all organic fertilizers. An extract of wood ash or any potassium fertilizer that does not contain chlorine is applied under the bushes.

Excess nitrogen can also be harmful.

Excess zinc

It does not occur so often, but most summer residents cannot recognize it and only aggravate the situation. This happens when the multiplicity and frequency of microfertilizer application is violated. The leaves curl up and droop as if in drought.

The main sign of excess zinc is the appearance of a purple tint on the lower part of the stem (no higher than 20-30 cm). To correct the situation, tomatoes are fed with organic matter and no microelements are added for at least 15-20 days.

Some varieties have a genetically determined purple hue. But then the stem is evenly painted in this color.

Excess zinc is difficult to recognize.

reason 5. Damage to the root system

After planting seedlings, especially in a greenhouse, tomato leaves may curl slightly. This is fine. Root system in seedlings it is usually less developed than the above-ground part, so for several days after planting the leaves of the plants are curled. If after 5-7 days they have not acquired a normal appearance, it is necessary to water the tomatoes with stimulants Kornevin or Heteroauxin.

When planting seedlings in the ground, try not to damage the roots of the plants.

Roots are often damaged when deep loosening tomatoes. The leaves curl upward evenly throughout the bush. Neighboring plants look healthy. To correct the situation, water the tomatoes with root formation stimulants (Kornerost, Kornevin) and substances that support plant immunity: Epin-extra, Zircon.

reason 6. Incorrect stepsoning

Untimely removal of stepsons leads to leaf curling. Stepchildren are removed when their size is no more than 5-7 cm. If they have already outgrown, then it is too painful for the plant, so you will either have to leave them or remove them gradually over several days.

Removing overgrown shoots can affect tomato leaves.

If large stepsons have been removed and the tomatoes react to this by curling the leaves, then the only thing that can be done is to spray the tomatoes with Zircon or Epin-extra.

reason 7. Tomato pests

Very often affects tomatoes in greenhouses greenhouse whitefly. This is a small butterfly that lays eggs on bottom side leaves. Larvae and adults (butterflies) feed on plant juices. Insects secrete sweet honeydew, on which sooty fungus settles. The insect reproduces very quickly. It settles first on the youngest and most tender leaves at the tops of plants.

Avoid large concentrations of pests on tomato bushes.

Signs of defeat.

1. The leaves become deformed and curled, and then turn yellow and fall off.
2. On the underside you can find insect secretions in the form of sticky honeydew and small white scales - the remains of cocoons.
3. Lagging bushes in development.
4. The appearance of black spots of sooty fungus on the stems and leaves.

What to do

Once the whitefly spreads, it is very difficult to control it. The pest reproduces extremely quickly, and most insecticides have no effect on eggs and older larvae. Therefore, emergency measures must be taken when the pest is first detected.

When shaking bushes infected with whiteflies, the butterflies fly up and are easy to spot.

1. To catch butterflies, glue traps are used, which are placed on the tops of bushes.
2. When the pest spread is small, Fitoverm is used. Spraying is carried out on the underside of the leaves. and tomatoes can be removed 2 days after processing. Spraying is carried out repeatedly at intervals of 3-5 days to destroy newly emerged individuals, since the drug does not affect eggs. With strict adherence to treatment intervals, the number of pests can be significantly reduced.
3. Simultaneously with Fitoverm, tomatoes are sprayed with Fitosporin or Alirin-B to prevent and destroy sooty fungi.
4. In case of mass infestation of tomatoes by the pest, all fruits are removed in the technical ripeness phase, and the bushes are treated with Aktara. Treatments are carried out on the underside of the leaves at least 3-4 times with an interval of 4-7 days. After spraying, tomatoes should not be eaten for 20 days.

reason 8. Features of the variety

For some, leaf curl is a genetic trait. Cherry and small-fruited tomato varieties are mainly prone to this.

There are also such tomatoes.

Usually in this case the leaf blade curls down, forming a “chicken's foot”. But in some varieties the leaves can curl upward. In this case, nothing needs to be done; neither fertilizing, nor watering, nor ventilation will help. This is simply a feature of the variety.

Conclusion

If the leaves on the tomatoes are curled en masse throughout the greenhouse, then this is either a violation temperature regime, or lack of moisture.

If the leaves curl only on some bushes, then most likely this is a lack of nutrients. In this case, they curl gradually, first on one plant, then on the second, third, etc.

First of all, these bushes are carefully inspected, and then one of them is fed necessary fertilizers. If the measures taken have produced results, then the remaining plants are fed. If there is no result, then they continue to select the right fertilizer until a positive response is received. Only after receiving a positive reaction to fertilizing, all other tomatoes are fed with the same fertilizer.