Why do tomato seedlings turn yellow lower leaves. Reasons for poor growth of tomato seedlings after picking Planted tomato seedlings turn yellow what to do

Growing seedlings is not always successful, it often happens that seedlings deteriorate. Therefore, you should be armed with information about why the leaves of tomato seedlings turn yellow.

yellow leaves on tomato seedlings

Tomato seedling care

A common reason why tomato seedlings turn yellow lies in fungal diseases. One of them is fusarium, from which planting material often gets sick. Before sowing tomato seeds, it is important to process them in order to eliminate the likelihood of spores in the planting material.

To cure an already infected tomato, you need to process the planting material and transplant it into a new fertile soil. Another reason when tomato seedlings turn yellow is fungal disease blackleg. If the care of the tomato is not correct, the plant becomes prone to black leg. If the tomatoes dry and the tomato turns yellow, you can treat the plant with wood ash.

Land for planting seedlings is purchased at the store and frozen beforehand so that the plant grows healthy. Also, seedlings are additionally treated with manganese and treated with hot water.

Sowing seeds is carried out at a distance of three centimeters from each other. The frequency of planting also has an impact on the development of seedlings and can cause the leaves of the plant to dry or turn yellow.

AT soil mix for a tomato, sand is added to reduce the density and, if necessary, adjust the acidity level of the soil. The place where the tomato is planted must be constantly ventilated. Excess moisture or excessive dryness can cause illness.

To grow a tomato, it is better to first plant seeds to grow seedlings. To prevent the disease, you need to know why the tomato dries and turns yellow, the main reason lies in improper planting and care of the material.

Causes of damage to seedlings

With improper care, planting tomatoes can not only dry or turn yellow, but also stretch. The main reason for overgrowth is excessive watering and excessive application of nitrogen to the soil. If the plant is stretched, its nutrition is disturbed, as a result of which the development of the plant is confused. To save the plant from disposal due to developmental disorders and spoilage. need to give the plant proper care and in time to carry out a rescue operation if the seedlings dry out.

If the vegetable has overgrown, it can be divided into two parts and so increase the amount planting material and keep the plant from dying. Prune the plant after the third leaf. top put in water. and when the root sprouts. transplanted into open ground.

These care activities are carried out three weeks before the planned transplant of the plant into open ground. It is necessary to have time to give seedlings to give lateral stepchildren so that the upper cut off section is subject to transplantation to the site.

Transplantation into open ground is carried out if the culture has given lateral processes. The more shoots on the sides, the more fruits one bush will give. If the plant begins to dry, it is urgent to do processing and pruning.

To ensure the health of the plant you need:

prepare seeds for planting;
choose clean fertile soil;
make potting mix based on soil. stove and top dressing;
plant seeds;
transplant seedlings open ground;
carry out feeding and processing of the plant.

Seedlings are tied up and stepson as they grow. The causes of damage to seedlings lie in many points:

bad soil;
infected planting material;
abundant light or lack of light;
improper feeding.

Only comprehensive care and attentiveness can provide the plant with longevity and high yield. To grow tomatoes, you need to plant at the turn of March and April, and transplant seeds into open ground after that. How will the night frosts end? Most reliable way to save seedlings from damage or death, it is to provide them with the right care throughout the entire development process.

There are several main reasons why tomato seedlings suddenly begin to turn yellow. If you deal with each situation, find out the main reasons, it will be much easier to deal with the problem.

Causes of yellowness:

The first thing to do to prevent the appearance of yellowness on the leaves is to create the necessary conditions for the growth and development of seedlings. So, it is important to choose the right soil, maintain a suitable level of lighting and humidity. Do not forget about regular watering and fertilizing with nitrogen, iron and zinc. Pay attention to the choice of capacity for disembarkation: the container must have suitable sizes and a drainage hole for water to drain - the liquid should not stagnate.

If the soil is wet all the time, the roots of the plant will simply begin to rot. The most important thing is to maintain the required temperature regime. The most favorable mode is about 25 degrees Celsius. Also, do not forget that they love moisture. This makes caring for tomatoes a fairly delicate process. Make sure that the soil does not dry out, but is not too wet.

Proper feeding of tomato seedlings will avoid yellowness and other problems that can lead to death and. The first time we feed the plants after the emergence of shoots - literally in 7-10 days. The next time is in two weeks. For feeding, you can use special means for tomato seedlings, or prepare the mixture yourself: take 10 liters of water, dissolve 35 g of superphosphate and 5 g of urea in it.

It is forbidden to apply any type of top dressing on a dry clod of earth. This can lead to burns on the roots of plants, and therefore the earth must always be moistened.

Problems with yellowness can also be caused by a lack of oxygen in the root system: as a result of watering and fertilizing, the soil around the roots of the plant is compacted, and a thin crust appears on the surface of the earth, which prevents the supply of oxygen. To prevent this from happening, be sure to carefully loosen the surface of the earth - for this it is better to use a pick stick so as not to damage the roots.

It is important to harden plants. About 20-25 days before planting, you need to start hardening the seedlings, accustoming the plants to direct sunlight. You can take the container with tomatoes to the balcony or put it outside. At the same time, you should start to harden the tomatoes gradually: first set the seedlings for a few hours, then increase the time, most importantly at night, remove the plants in a warm place. In just a couple of days, you can set seedlings for a full day and night. Now you know why tomato seedlings turn yellow, which means you can quickly fix the problem if it occurs.

Why tomato seedlings turn yellow: reasons

If high humidity is aggravated by poor watering and a lack of calcium, chlorosis makes itself felt on the apical leaves, and vertex rot on the fruits of the plant. With prolonged or excessive soil moisture, the leaves also begin to turn yellow.

The appearance of yellow-green spots on the entire surface of the leaves (usually the lower ones), excluding the veins, often indicates nitrogen starvation. With a lack of magnesium, the edges of the affected leaves twist up, dark red pigmentation occurs. The development of chlorosis on the tops of the leaves and the death of the affected areas is usually associated with a lack of phosphorus, and when it is in excess, both the leaves and the stem turn yellow in the plant.

When lower leaves turns yellow, and new ones grow in the usual green light, you should not worry about the harvest.

How to prevent yellowing of tomato seedlings?

There are several main reasons why tomato seedlings suddenly begin to turn yellow. If you deal with each situation, find out the main reasons, it will be much easier to deal with the problem. Leaf color also depends on nutritional conditions. Chlorotic leaves (usually on the lower tiers) are observed on soil rich in organic matter, but poor in copper, such as peaty soil. and eliminate its causes. When the leaves and stems continue to grow, feed the plants with a solution of slurry (1:10) or mullein (1:20) with ash.

If the conditions for growing tomatoes are not observed, chlorosis may develop. Most often, young plants or seedlings are affected by them.

Top dressing and hardening of plants - the key to the health of seedlings

"Pentaphage";

In addition to physical damage to the plant's root system and lack of nutrients, tomatoes can turn yellow in the greenhouse and when affected by a fungal disease such as Fusarium. This disease manifests itself, primarily by changing the leaves of tomatoes, their elasticity and color.

Tomato leaves evaporate a large amount of moisture, and if there is a deficiency of it, the upper leaves begin to turn yellow and curl. Another problem is most common in greenhouses and hotbeds, namely excessive air humidity.

You can also dilute a couple of glasses of table vinegar in 10 liters of water and also pour it into the moves of the bear. That is, you should not overexpose the seedlings at home, sowing the seeds much earlier than the indicated dates, or provide each plant with at least 3 liters of soil. In order for the seedlings to “come to their senses” faster and

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Why do tomatoes turn yellow in a greenhouse - a professional look

Pay attention to the choice of container for disembarkation: the container must have suitable dimensions and a drainage hole for water to drain - the liquid must not stagnate
Transplanting tomato seedlings

If the yellow leaves have also become thick and hard, and the stems are woody, this means that the tomatoes lack sulfur.

Causes of yellowing tomatoes in greenhouses

For the successful treatment of fungal diseases, the main condition is the strict observance of preventive measures. First of all, disinfect the seeds. To do this, hold them for 20 minutes in a 1% potassium permanganate solution, and then rinse twice with fresh water. Be sure to disinfect the seedling boxes. To prepare the soil mixture, take the earth only in those places where there are no signs of the disease. If you plan to grow tomatoes in a greenhouse, then it is better to prepare a new soil mixture.

The cause of the disease is usually bad job root system.
"Alirin-B";
Causes Fusarium wilt soil fungus, long time living in the soil. It can be transmitted through infected seeds, garden tools that were used to cultivate contaminated soil and were not disinfected, plant remains.
To avoid this, you need to ensure good ventilation in the greenhouse (see Ventilation in the greenhouse with your own hands is possible). Excessive waterlogging of the soil can also lead to yellowing of the leaves.
For reference: Wireworm - larvae of click beetles, yellowish caterpillars, the length of which can reach 2 cm. They "specialize" in eating roots, but can also penetrate the plant stem.

To provide her with additional nutrition that she does not receive from the root system, she can be sprayed with a weak, 1% solution of mineral fertilizers (phosphates, nitrates, chlorides)

Damage to the root system during transplantation

There are several main factors that cause yellowing of the leaves and trunks of tomatoes:
.
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When young, and then old leaves acquire a light yellow color, and they all gradually dry out, it means that there is little manganese in the soil (this happens with excessive liming). With chlorosis caused by iron deficiency, old leaves do not die off. Remains of infected bushes must be collected and burned outside garden plot. Do not use them to make compost or other fertilizers. Disinfect thoroughly gardening Tools. A bed for planting tomatoes must be prepared in a place not infected with the disease. Areas with heavy loamy soil are most susceptible to the spread of fungi. Therefore, if you plan to grow tomatoes in such places, be sure to dig the soil by adding coarse sand. This phenomenon can cause Fusarium wilt. It talks about a dangerous fungal disease that tomatoes often get sick with.
"Fitosporin-M";
For this fungus, conditions conducive to growth and reproduction are high humidity along with high temperatures.
Yellowed tomato leaves can also indicate an insufficient amount of nitrogen in the soil. As a rule, plants suffering from a lack of nitrogen are weaker, with thin stems and small leaves.

Damage to the root system by insects

In order to get rid of them, you can use the drug "Bazudin", which is mixed with sawdust or sand, and then dug into the soil around the plants. You can also carry out tillage in advance, before planting tomato seedlings in a greenhouse.

Damage to the root system during transplantation;

If the soil is wet all the time, the roots of the plant will simply begin to rot. The most important thing is to maintain the required temperature. The most favorable mode is about 25 degrees Celsius. Also, do not forget that tomato seeds love moisture. This makes caring for tomatoes a fairly delicate process. Make sure that the soil does not dry out, but it is not too wet either.
Causes of yellowness:
Yellowish-green color and yellow spots between leaf veins are a sign of nitrogen starvation. With a deficiency of magnesium, reddish pigmentation appears in places of chlorosis, and the edges of the sheet twist upwards. The general yellowing of the plant can also be caused by an excess of phosphorus.

Introduction enough potash and phosphorus fertilizers helps to increase resistance to fungal diseases in tomatoes.

Violation of the nutrition of the roots occurs when they are damaged or the plant is overcooled. Moreover, non-optimal temperature conditions affect all phases of plant development, including fruiting. Leaves become yellow color, often with a bluish tinge.
"Mikosan"; If only the old, lower leaves of the plant turn yellow, and with new ones growing at the top, there is no such problem, then this
To do this, three to four days before planting plants in a greenhouse, pieces of carrots, beets or potatoes are buried to a depth of about 10 cm, which are strung on sticks long

Deficiency or excess of moisture

That is, no more than 10 grams of dry fertilizers or 10 ml of liquid fertilizer can be put on 1 liter of water. You can put less fertilizer, but you can’t do more, as you can burn the leaves. Damage to the root system by insects; Proper feeding of tomato seedlings will avoid yellowness and other problems that can lead to death and disease of tomatoes. The first time we feed the plants after the emergence of shoots - literally in 7-10 days. The next time is in two weeks. For top dressing, you can use special products for tomato seedlings, or you can prepare the mixture yourself: take 10 liters of water, dissolve 35 g of superphosphate and 5 g of urea in it. red, then the problem is a lack of nitrogen - this is the most important element for tomatoes. In this case, too small leaves can also be found. You need to use nitrogen supplements, which can quickly correct the situation. But with its lack, chlorosis develops only at the top of the leaf, then this area dies off.
Along the way, you can spray with a solution of potassium permanganate (1 tablespoon per 10 liters of water).

It also happens that the seedlings have grown quite good, but slightly outgrown. Why does yellowness occur? During transplantation to the greenhouse, the roots of the plant are an intertwined ball. As a rule, such seedlings take much longer to adapt, during which the overgrown roots die off and the tomato leaves begin to turn yellow.

Lack of minerals and trace elements in the soil

nitrogen starvation

"HOM".
Fusarium can affect plants at any stage of their development: both in seedlings and in adulthood. The fungus first attacks root system tomatoes, after which it spreads to the stem, and subsequently a violation of the entire system of supplying the plant with nutrients. The problem is easily solved by introducing nitrogen-containing fertilizers or manure into the soil 15-20 cm

You can spray seedlings with a similar solution daily, until the plant adapts and new roots and leaves form, which can provide nutrition to the plant.

potassium deficiency

Lack of minerals and trace elements in the soil;

Manganese deficiency

It is forbidden to apply any type of top dressing on a dry lump of land. This can lead to burns on the roots of plants, and therefore the earth must always be moistened. One common reason for eating is that the plant lacks potassium. Fertilizers are also indispensable here.
In all cases, if the plants are suffering due to abuse rather than infection, remove the cause of the physiological disease. And as soon as the stems and leaves begin to grow, feed the planting with a solution of mullein (1:20) or slurry (1:10) with ash.

The reason may be bad conditions growing tomatoes.

fungal diseases

Fusarium

Often, diseases such as Fusarium wilt, a fungal disease that often affects tomatoes, can develop after transplantation. It is expressed in the withering of the leaves, the loss of their turgor. The disease is caused by soil fungi capable of long time live in the ground. They can significantly reduce yields. The source of the disease lies in infected seeds, plant debris or tillage tools. By the way, the probability of damage to tomatoes by a fungus does not depend on age and is the same for seedlings and for plants in a greenhouse or open field. First, the disease affects the root system, then spreads to the stem and, as a result, disrupts the functioning of the vascular system. That is why the plant weakens and stunting occurs, accompanied by the appearance of yellowness on the leaves.
You can try to save diseased plants:
This disease can be treated with drugs such as:

. Manure is diluted with water and insisted for a week, after which it is diluted in a ratio of 1:10. and tomatoes are watered.

. the tips of the sticks should be above the ground.
Of the possible measures that can still be taken in order to "reanimate" such seedlings, in the process of transplanting, treat the roots with any root formation stimulator, for example, "Kornevit" or "Kornevin", according to the instructions from the manufacturer.

Deficiency or excess of moisture;
Problems with yellowness can also be caused by a lack of oxygen in the root system: as a result of watering and fertilizing, the soil around the roots of the plant is compacted, and a thin crust appears on the surface of the earth, which prevents the supply of oxygen. To prevent this from happening, be sure to carefully loosen the surface of the earth - for this it is better to use a pick stick so as not to damage the roots.

late blight

In the event that the leaves are also curled and speckled, then the problem is a lack of zinc. Seedlings will have to be fertilized.
See related questions

Moreover, seedlings and young plants most often suffer from physiological diseases.

If only the lower leaves of the plant turn yellow, this indicates mechanical damage to the roots. For example, during loosening the soil or when planting seedlings on the beds. You should not worry about this: when new adventitious roots appear and the plant takes root, the color of the leaves will be restored.

Bordeaux liquid;
"Previkur";
After a couple of days, the sticks, along with pieces of vegetables and wireworms that have settled in them, are pulled out and burned.
Insects, such as a bear or the larvae of click beetles, often called wireworms, can also damage the root system of tomatoes. All these pests love to "eat" tender roots.

Various diseases (see Diseases of tomatoes in a greenhouse: their varieties and how to deal with them).

It is important to harden plants. About 20-25 days before planting, you need to start hardening the seedlings, accustoming the plants to direct sunlight. You can take the container with tomatoes to the balcony or put it outside. At the same time, you should start to harden the tomatoes gradually:
When the yellowness on the leaves turns into white spots, the problem is that the plant simply does not have enough iron. If you choose the right top dressing, then the problem will be solved in just a day or two.
http://answer.mail.ru/question/58368321/

The most common cause of leaf chlorosis is poor root function. Violation of root nutrition occurs when the roots are damaged and due to hypothermia of both the entire plant and only its underground part. Moreover, the violation of the temperature regime affects all phases of plant development until the end of fruiting. However, when cooled, all leaves turn yellow and acquire a bluish tint.

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Why do tomato leaves turn yellow in a greenhouse?

Particular attention should be paid to watering. Tomatoes have a main root that reaches 1.5 m in length, thanks to which they are able to tolerate drought. The main part of the roots is located no deeper than 25 cm. Moisture deficiency occurs due to the large evaporating surface of the leaves of the bush. With insufficient soil moisture, yellowing and twisting of the upper leaves are observed.

"Infinito";

The main causes of yellowing leaves

"Trichodermin."

If there is not enough calcium in the soil, then the leaves of the tomatoes also turn yellow. Only at first small bright dots appear, which subsequently merge into a single bright spot.

Tomatoes are quite large,

Medvedka, a rather unpleasant insect, the length of which can reach 5-7 cm. It prefers well-manured soils enriched with humus.

Having listed the main causes of yellowing tomatoes, let's figure out what to do to save greenhouse tomatoes.

First set the seedlings for a few hours, then increase the time, most importantly at night, remove the plants in a warm place

Yellowing leads to malnutrition of the roots. Most often, this occurs due to damage to the roots during improper planting or due to a change in temperature. If the matter is in the roots, you should not worry - tomatoes can cope with this problem on their own after a while. The main thing is to try not to damage the root system anymore.

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With mechanical damage to the roots (for example, after planting seedlings on a garden bed or when loosening the soil), only the lower leaves turn yellow. As soon as the plants take root and new adventitious roots grow, the color of the leaves and shoots is restored.

When growing tomatoes in a greenhouse or greenhouse, excess air humidity is often created. If there is a lack of nitrogen in the soil, then in the first half of the growing season, the leaves grow and turn yellow. Further, cracking of the fruit is observed. From this it is clear why the main attention is paid, first of all, to the nitrogen content in top dressing.

Nutrition is the most important factor

"Tattu".

Another fungal disease in which tomato leaves turn yellow in greenhouses is late blight.

Treatment and prevention of diseases

It is characterized by the fact that young leaves acquire a light yellow color first, and only then old ones.

about 1.5 meters

Medvedka Damage to the root system of tomatoes during their transplantation to permanent place in a greenhouse or greenhouse. The roots do not fully perform their functions and do not deliver required amount water and nutrients to the plant. In just a couple of days, you can set seedlings for a full day and night. Now you know why tomato seedlings turn yellow, which means you can quickly fix the problem if it occurs.

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Why do tomato plant leaves turn yellow?

JOY

A simple reason is the lack of soil in the container. If this happens to you, carefully transplant the tomatoes into a larger pot.

http://www.tomat-pomidor.com/2010/04/why-tomato-seedlings are sick/ Why are tomato seedlings sick?

Such a situation may also arise. Due to the long (up to 1.5 meters) main root, the tomato tolerates drought. But the main part of the root lobe is at a small (15-25 centimeters) depth. The evaporating surface of the leaves of the bush is large, and with a lack of moisture, the upper leaves turn yellow. If there is not enough moisture, then along with yellowing, twisting of the leaves is observed.

High air humidity, combined with a lack of calcium and poor watering, provokes the development of chlorosis on the upper leaves, and vertex rot appears on the fruits. Excessive or prolonged soil moisture should be avoided, and an appropriate microclimate should be maintained in the greenhouse or greenhouse.

But the main preventive measure will be thorough disinfection of the soil (see How to cultivate the land), for example, with a saturated pink solution of potassium permanganate both in autumn, after harvesting, and in spring, before planting plants in the ground.

This disease manifests itself as brown spots on yellowing drying leaves, which then spread to the fruit. As a disease prevention experienced gardeners recommend watering tomatoes only under the root, or with drip irrigation systems.

A lack of this element in the soil can be caused by too much large quantities lime introduced into the soil.

, the main root, thanks to which the plants are quite resistant to drought. But at the same time, the main part of the small roots is at the depth of everything

The bear equips its nest at a depth of 10-15 cm, from where it makes its way to the roots of plants. To combat this pest, you can use the drug "Thunder" or "Medvetoks."

Most often, this phenomenon is observed in seedlings that have grown a little, or grown in very small containers. The roots of such seedlings are a dense ball.

Sometimes, on strong and healthy, at first glance, tomato bushes growing in a greenhouse, separate yellow leaves appear.
Light problems can also cause seedlings to turn yellow. It is best to extend the length of daylight for plants by using grow lights for at least 6 hours a day.

In greenhouses and greenhouses, on the contrary, excess air humidity is sometimes created. If at the same time the beds are poorly filled with nitrogen, then in the first half of the growing season the leaves grow and turn yellow, and in the second half the fruits crack.
The nutritional conditions of tomatoes directly affect the color of the leaves. Its change is associated with a lack of nutrients. On soil with a low copper content, but rich in organic matter, chlorosis is observed on leaves (usually the lower tier). If the leaves turn yellow, become hard and thick, this indicates a lack of sulfur. With excessive liming, the appearance of a light yellow color on young, and then on old leaves, along with their gradual drying, indicates a low content of manganese in the soil. In addition, chlorosis occurs with iron deficiency, but the death of old leaves does not occur.
The appearance of yellow color on the leaves of tomatoes is a very common phenomenon. Many gardeners are probably familiar with the situation when, despite optimal watering and care, tomatoes dry up and turn yellow. Regardless of the landing site, be it a greenhouse or open ground, the problem remains. To understand why this happens, it is necessary to consider the possible causes.

With any deficiency of minerals or trace elements in the soil, you can apply a solution of slurry, in a ratio of 1:10 with ash, or a solution of mullein, in a ratio of 1:20 (see. Top dressing of tomatoes: what fertilizers and when to use).

There are subtleties in caring for tomato seedlings. Without creation necessary conditions it is difficult to count on getting strong healthy bushes, which in the future will give their owner a bountiful harvest. For those who grow seedlings on their own, it is often difficult to understand why they are sick, look frail, or turn yellow. We will talk about the causes of the last problem.

There can be several reasons for yellowing leaves, and they are all unrelated. First, let's say that tomatoes like neutral or slightly acidic soil, fertilizers with a predominance of phosphorus, sunlight, regular ventilation, moderate moisture and warmth when growing. Seedlings grown in such conditions will certainly look vigorous and healthy. Yellowing of the leaves may occur due to non-compliance with the requirements of the culture. Here are the most common reasons:

Unsuitable soil for growing tomato seedlings.
Wrong watering regime.
Deficiency or excess of the required amount of fertilizers in the soil.
Weak lighting.
Too dense fit.

As soon as you notice this undesirable phenomenon, you need to take immediate measures to correct the situation, then it will be possible to prevent the death of seedlings and restore her health.

For growing seedlings, it is advisable to use only specially designed soil with the necessary acidity and a balanced amount of fertilizer. Tomato leaves may turn yellow if the soil is too acidic or alkaline, dense, contains an excess of fertilizers, its surface is covered with a hard crust that does not let oxygen through to the roots.

With excessive watering, the leaves turn yellow due to the fact that the earth turns sour, compacted, and ceases to let air through. Too little watering interferes with the normal nutrition of the leaves, besides, they simply dry out due to lack of moisture. Nitrogen and phosphorus move into the stem, which causes yellowing of the foliage. Also, water for irrigation should not be hard, otherwise salinization of the soil will occur. And the roots will, on the contrary, draw nutrients from the plant.

Nitrogen must be used for top dressing, but its content should be moderate. With its deficiency, the plant independently redistributes this element in the tissues, transferring it from old leaves to young ones, so the lower leaves turn yellow. From excess nitrogen, the same salting occurs, which leads to watering with hard water.

If only the tips of the leaves turn yellow, this indicates a lack of potassium in the soil. If the soil is acidic, potassium will be wasted on deoxidizing the soil instead of going to the plant.

On a note! In a cold room, tomatoes simply cannot digest useful material, even if there is an abundance of those, so the foliage will turn yellow as if there is a lack of fertilizer.

It should be remembered that daylight hours when growing tomatoes should be at least 12 hours. Seedlings grown in northern climatic zones especially suffer from a lack of light. It is necessary to use additional lighting with fluorescent lamps, then the leaves of the tomatoes will not turn yellow from low light. But you don’t need to be too zealous with light, otherwise iron will no longer be absorbed due to its excess, and chlorosis will affect young bushes.

If planted too densely, the seedlings will also lack light, and the roots, being in cramped conditions, will not be able to work normally and absorb nutrients. Here is the reason for the yellowing of the leaves. In addition, such seedlings stretch out and run the risk of falling ill with late blight, because it is also very difficult to ventilate it under such conditions.

How to help tomato seedlings

Of course, in each case, the help will be different. If the situation has been correctly analyzed and the cause of the yellowing of the leaves has been clarified, it is time to take steps to eliminate it.

First of all, cut off the leaves that have changed their color, they can no longer be restored, and they continue to consume nutrients without benefiting the plant.

Yellowing of the lower leaves can also lead to natural causes. Seedlings are actively growing and developing, releasing new foliage and spending energy on the formation of ovaries. The lower leaves eventually lose their functions and simply need to be removed.

Yellowing of the lower part of the crown can also occur if the seedlings are standing near hot battery. Tomatoes love heat, but everything should be in moderation. Optimum temperature their content will be an indicator of 22 ° C. If hot, dry air enters the seedlings from below, the leaves may turn yellow and curl. Move the box closer to the glass, or cover the battery with several layers of thick cloth.

On a note! If at the same time the leaves also acquire a bluish tint, it means that the seedlings are subjected to a strong difference in day and night temperatures. Do not open the window at night.

If you suspect that overwatering is causing yellowing of the lower leaves, adjust it. Tomatoes don't like living in a swamp. In the event that the surface of the soil seems dry, simply loosen it, and postpone watering for another 2-3 days. Tomatoes love plentiful, but rare watering.

The yellowing of the lower leaves does not occur completely, they only become covered with yellow spots, and then fall off? There is a lack of nitrogen, urgently apply fertilizer for the normal development of seedlings. Yellowness in this part of the crown also appears due to a lack of other elements:

copper;
sulfur;
manganese;
gland.

The problem should be solved by introducing a comprehensive mineral fertilizer for vegetables.

Young bushes may turn yellow and dry due to Fusarium damage. To prevent this from happening, the seeds must pass pre-sowing treatment by soaking in a fungicide solution. Seedlings that have become ill with Fusarium should be transplanted into fresh soil and treated with antifungal drugs.

Another reason for this phenomenon may be the defeat of seedlings by the "black leg". The disease often occurs due to too dense planting and improper care. Seeds should be sown in the ground at a distance of 3 cm from each other. Sand must be added to the soil to improve permeability. Excess moisture near plants is eliminated by regular ventilation. You can rid the seedlings of the "black leg" by sprinkling the surface of the soil with wood ash.

Important! Literally in one day, the leaves may turn yellow and begin to dry out due to the death of the roots. Tomatoes are a heat-loving crop and watering is detrimental to them. cold water. If the roots died due to exposure to low temperatures, then the seedlings can no longer be saved.

If the leaves turn yellow immediately, the reason lies in stress. Most likely, the procedure was not carried out carefully enough, and the gardener damaged the roots of the plants. Seedlings after such exposure begin to hurt and stop growing. You can reduce stress by spraying the bushes with Epin. This will not be able to damage the plants, but it will give an opportunity to recover.

You can also compact the soil in cups. Sometimes the roots are prevented from taking root by air voids formed in the container after transplantation. As soon as the roots recover and begin to fully work, the seedlings will start to grow.

The decisive factors are the light and temperature conditions, as well as competent watering:

Lighting is especially important for growth in the first days after germination. At this time, the daylight hours should be 16 hours long, when the seedlings grow and get stronger, the additional illumination can be reduced so that in total the plants get 12 hours a day, taking into account natural lighting.
T the temperature in the room with seedlings at the germination stage should be in the range of 22-25°C. After the emergence of sprouts temperature indicator reduce to 16-17 ° C, in such conditions the seedlings should be 1-2 weeks in order to slow down the growth of the aerial part. After that, the tomatoes are again raised the temperature of the content to the previous levels.
Watering very small seedlings is best done from a syringe, when the bushes grow a little, the dose of water should be increased, but the tomatoes should not be watered more than once a week, preferably through a pan. If moisture gets on the tender stems, the plants can get sick with a "black leg".

If the seeds were sown in a soil balanced in composition, then the first time it will be necessary to apply fertilizer a week after picking. healthy seedlings has thick stems, compact size and bright green leaves.

Why the leaves of tomato seedlings curl and turn yellow: video

It is not so difficult to follow the rules for growing tomato seedlings. If you initially pick up zoned seeds, sow them in fertile soil, provide the necessary temperature and light indicators, water them in the right amount, then problems with tomatoes should not arise. But even if the seedlings turn yellow for some reason, most often this can be corrected without prejudice to the further growth of plants.

Hello dear readers!Today, you won’t surprise anyone with the fact that you can buy at every step everything that comes into your head, therefore, the sale of tomato seedlings has also not amazed anyone for a long time. Any variety to choose from, and now - your box of young plants, without painful months of nursing on the half-dark windowsill of Khrushchev.

It is not easy to grow seedlings at home, and many do buy plants ready for planting in the ground, at the risk of acquiring diseased, weak or unsuitable for growing in the conditions prepared for them. But that is if you are a beginner.

An experienced plant gardener will immediately understand both the involvement in the variety and the state of health, but he is also experienced in order not to do this, but to grow it himself. If you have no time to bother with growing, and you still go to the market, then read.

A tomato at the beginning of its growth can be quite picky, and in any case, you bought seedlings or grew them yourself, it can surprise you in the form of yellowed leaves. The only difference will be that you studied your shoots during their growth, and under what conditions you grew purchased ones is a mystery.

One way or another, it will still be necessary to identify the cause to eliminate the symptom that has arisen, which clearly signals the poor health of the tomatoes. In this article, we will look at possible options our actions if the leaves of tomato or pepper seedlings turn yellow.

Leaf yellowing is a fairly common nuisance that can happen to tomato seedlings, even if they receive both nutrition and light. There can be many reasons for this phenomenon:

You overdid it and flooded the plants at the next watering
You overlooked and underfed the plants - now they are hungry
You grow seedlings in cramped containers that are already filled with roots
Your plants are deficient in nitrogen and unable to grow further

Your plants are experiencing a lack of light, which means they are starving again
Your plants are suffering from acidic soil, check if the soil is turning white in the box
Your plants are cold, sick and will soon shed their yellowed leaves

Waterlogging

Excess moisture in the soil can provoke a fungus that develops in dampness, or root rot, or both at the same time. Plus, water washes away all the nutrients, and the plant is starving. Here are the yellow leaves.

It is not worth waiting for the moisture from the soil to evaporate, you just need to change the substrate of the plant - there is no other way out. And do not forget to make drainage and a drainage hole in the new container.

In order to determine optimal humidity in the soil for seedlings, you need to stick your finger into the ground. If the soil is moist and sticks to the skin, then watering should be postponed.

Phytophthora

take care of preventive measures to combat late blight should be in advance, even at the seed stage. To do this, the seeds must always be dressed in solution.

When the fungus nevertheless got to the seedlings and settled on the stem and leaves, you will have to change the substrate and disinfect the boxes or glasses, and destroy the infected shoots. Only such extreme measures will save the remaining plants from death.

nutritional deficiency

Feeding seedlings is recommended only if it requires it. Usually, tomatoes are sown in nutrient soil, where all the necessary elements are already present, and after a certain time, when they run out, young tomatoes are fed with a special microfertilizer for seedlings. Maybe the moment of feeding has just come, if the lower leaves have turned yellow, and there are no other reasons for this.

Lack of light

With a lack of light, the seedlings first stretch and thin, and then begin to turn yellow. Direct sunlight can be detrimental to young shoots, but the lack of light will have a detrimental effect on them. Seedlings need to be accustomed to the sun gradually, bringing the plants to light for a certain time, gradually increasing it.

Try not to thicken the plantings and not be greedy. It is better to grow 20 strong tomatoes than 50 thin blades of grass that cannot bear transplanting.

nitrogen deficiency

With a nitrogen deficiency, the leaf plate itself turns yellow, but the veins remain green, so this symptom is easier to track than others. Nitrogen is responsible for plant growth and is very necessary for tomatoes at the beginning of development.

With its deficiency, the plant first turns pale and becomes light green, and if measures have not been taken, it begins to signal starvation with yellow leaves. But even at this stage, fertilizing with a nitrogen-containing fertilizer will save your tomatoes.

Root growth restriction

If you did not calculate the volume of the cups at and underestimated your plants, then it may happen that they have outgrown their containers and filled the entire soil with their roots. Transplanting tomatoes into a larger container will help them recover.

But give them time for this, it often happens that seedling leaves turn yellow just after transplantation and experience temporary stress in larger containers. Often, tomato seeds are immediately sown in separate cups and do not waste time picking, which takes away strength from seedlings.

soil acidification

Acidic soil takes away the last strength from tomatoes, and makes them defenseless against the threat of infection.

Place the glass on top of the black bag and sprinkle some potting soil on top. Drip 9% vinegar on top. The absence of any reaction will indicate that in the soil hyperacidity, and this has a detrimental effect on seedlings (read how easy and simple you can).

Adding to the soil will help neutralize acidification.

Temperature drop

A sudden cold snap can overtake even on the windowsill of a closed window,

therefore, you should always follow the weather forecast and wrap the shoots. This problem is especially acute when seedlings are grown in a greenhouse or greenhouse. It is necessary to provide plants with reliable shelter, which should not interfere with sunshine especially during flowering.

So, let's sum up. If you initially planted pickled seeds in separate cups, having previously placed nutrient soil in the container and providing them drainage system, it remains only to monitor the lighting and water the plants with warm water in time. That's all the secrets of growing seedlings without yellowing foliage.

Happy harvest and see you soon!

Sincerely, Andrey!