Tomato seedlings are light green, which is missing. Learn more about plant nutrition
Tomato is a fairly resistant crop, and domestic gardeners grow it almost everywhere in the country. One of the key stages of growing a tomato in a garden or greenhouse is the need to know and understand the diseases that can befall them. In addition, not only tomato leaves will suffer, but the whole plant, and later the entire tomato plantation.
What to do if your tomatoes are exposed to direct sunlight? First of all, you can make sure that you are dealing with sunburn when examining plants, if white spots are visible on the leaves in some places or everywhere, these are certainly traces of a burn. This can happen if, for example, you put seedlings in a container on a windowsill that is illuminated by direct sunlight. Another one alternative cause- the seedlings were transplanted into the open ground, and the plant received stress (from a slightly shaded place to a well-lit open area).
What to do in the situation when the leaves turn white on the tomatoes?
Try to gradually "accustom" tomato seedlings to bright light. To do this, place a container with rooted shoots of this crop in a sunny place for a short time. When the time for planting tomatoes in open ground is approaching, it is recommended to expose the container with seedlings to the street every day. A few hours a day is enough for the greens to begin to get used to the bright sunlight. Only after the implementation of such procedures can you safely engage in planting seedlings in the garden.
Video “Tomato seedling problems”
From the video you will learn about the most common problems of tomato seedlings.
The misfortune of adult plants
Very often, a lack of fertilizer or improper care of a vegetable crop can lead to a low yield of your tomatoes. But if you notice that their leaves turn white, it is advisable to immediately try to find out the cause. Most likely, such a problem arose not because of the provision of illiterate care for tomato seedlings, but because of the invasion dangerous pests or the occurrence of serious illnesses. Before buying store-bought insecticides, you need to find out what is the reason for the whiteness of the leaves on tomato seedlings.
brown spot
If most tomato diseases have whitened leaves in a tomato among the key symptoms, then brown spot suggests a number of problems. Moreover, tomatoes grown in greenhouses are most susceptible to this disease. 
What are the symptoms of a disease called brown spotting:
- inner part sheet plate covered with white fluff;
- over time, the plaque changes its color, characteristic dark brown shades appear;
- slight yellow spots can be seen on the front of the tomato leaf;
- as a rule, the development of the disease can be stopped in the early stages, but if nothing is done, the leaves of the tomatoes curl over time, and the plant itself dies sooner or later.
What tomatoes lack when it comes to prevention is regular ventilation, as well as lowering the level of humidity. Thus, you can prevent serious consequences from this kind of disease.
white rot
This disease affects not only the leaves of the tomato, but also the stems of the plant. Gradually, white spots appear on the vegetative part of tomato seedlings, and the stems soften, a kind of mucous membrane appears on them. It is necessary to treat the plant urgently, otherwise it will simply wither. What is specifically recommended? 
First of all, it is desirable to eliminate the infected parts of the plants. Then it is recommended to treat the cut points with chalk, charcoal, potassium permanganate or a solution of blue vitriol. Bordeaux liquid can be used as a universal remedy for such problems. Experienced farmers spray tomato seedlings with it.
powdery mildew
If tomatoes have light leaves, it is quite possible that the reason lies in powdery mildew, that is, in the invasion of marsupial fungi. How to recognize this kind of disease? On the lower part of the leaf plate, a gray coating appears and white shades. At the same time, characteristic yellow spots can be seen on the upper side. As a result, the leaves simply begin to dry out if the plant is not cured in advance. 
It is noteworthy that it is quite difficult to defeat him, it is much easier to resort to basic preventive measures. So, high humidity and in general changes in moisture levels - optimal microclimate for powdery mildew, it is recommended to treat plants with a special preparation during such periods.
Septoria
This is fungal disease, dangerous enough for tomato seedlings. By the leaves vegetable crop spreading yellowish brown spots.
Many diseases can damage tomatoes, leaves turn white or, for example, small dots of light gray appear, which means that not everything is in order with the plants and they need urgent help. By understanding why the leaves turn white, you can take measures to eliminate the existing disease or imbalance. nutrients. In fact, the appearance of white spots on the leaves can be observed during the cultivation of seedlings, and immediately after planting the plants in open ground or in the final place in the greenhouse.
Leaves of seedlings can turn white different ways, because in some cases there is a gradual lightening and the acquisition of a white color by the surface, while in other cases, small white dots or a characteristic plaque may appear on the leaves light color. If the leaves of tomatoes turn white, there can be an extremely large number of reasons for the appearance of such a condition.
Common problems and diseases that can cause white spots include:
- sunburn;
- chemical burns;
- septoria;
- white spotting.
Among other things, often the appearance of white patches is associated with a lack of nutrients. This usually happens when tomato seedlings have been grown in one place for many years and the site owners do not fertilize and do not properly disinfect the soil.
It is worth noting that the wilting of the leaves and the appearance of white patches on them, oddly enough, can also be associated with an excess chemical fertilizers, which is especially often observed in cases where gardeners do not follow the sequence and schedule for applying potash and nitrogen fertilizers.
Before taking specific actions to treat seedlings, you should figure out in advance why the leaves of tomatoes turn white.
Diseases of tomatoes and ways to deal with them (video)
How to deal with whitening of tomato leaves
The appearance of white spots on tomatoes is possible when growing plants both in a greenhouse and in open ground. If the tomatoes are grown in a greenhouse and you see completely white leaves appearing on top of the plants, sunburn is most likely the problem. The thing is that if the owners of the greenhouse do not open the windows in it or simply do not lift the covering material during the hottest hours, there may be an increase in the temperature in the greenhouse to critical levels.
After planting in open ground, seedlings grown in a greenhouse may develop white sunburn.
To prevent the development of sunburn and in this case is a very real task. If transplanting seedlings is done when the weather is hot, it is very important to shade the plants for 2 weeks until they take root and get stronger. Among other things, in some way, evening watering can save seedlings planted in open ground from sunburn.
Chemical burns can appear on tomato seedlings due to the excess dosage of chemical fertilizers in the manufacture of the solution. When such a too thick solution gets on plants, even in small quantities, this may first provoke the appearance of an extensive white spot, and then the death of the damaged leaf. In addition, a number chemicals, used to prevent certain diseases of tomatoes, can only be used in cloudy weather, as they reduce the natural protection of plants from sunlight, which can cause severe burns, and sometimes even death of plants.
When white spots appear due to fungal diseases such as septoria or white spot, additional symptoms of existing diseases will certainly be present. Such additional symptoms may include wilting and curling of the leaves, and in addition, their premature death. In case of detection of signs of fungal diseases of tomatoes, it is very important to treat the plants with special chemicals containing copper. Timely targeted treatment of tomatoes from the fungus will save the future crop.
Related Articles
If the seedlings immediately stretched out without having time to grow normally, then you can save it. There can be several reasons for pulling seedlings. First of all, this is very heat, which happens in our apartments, is more than 20 degrees, it is necessary to lower it, you can remove the second frames, cover the batteries central heating, open the window. The second reason is the lack of lighting, you can put a fluorescent lamp on the window and illuminate the seedlings in the morning and evening. Do not sow seeds early when there is not enough light, stick to optimal timing sowing. To save the seedlings, we need to thread them, we often grow more seedlings than necessary, then add earth. The second option is to cut the stem, the incision is made above the fifth leaf. The top needs to be put in water and when roots appear in a week, you can plant them like ordinary seedlings in the ground. On the second part of the seedlings, shoots will appear, we leave only a couple of the top ones, and cut off the rest, you need to do this 20-25 days before planting.
Plant in the OG, they will quickly catch up with their own, and in pots they will suffer. Cover with jars, film, covering, if you are so afraid.
Stretch prevention
Good luck to you. For the first time, seedlings should be fed 10 days after germination with a solution of nitrophoska (a pinch per 1 liter of water). Useful for the human body
Dilute one tablespoon of urea into ten liters of water and the liquid that turned out to be poured over the tomatoes on the windowsill. No need to be greedy when planting tomatoes in boxes. Shouldn't be stuffed a large number of tomato in one box. Better smaller bushes, but healthy and strong. The seedlings will then give large quantity fruits than frail sprouts that have grown in cramped conditions. It is more convenient to take care of twenty bushes than fifty bushes that give the same amount of harvest.In 3 weeks
One of the most important problems in growing tomatoes is pulling seedlings. Seedlings grow, leaves touch neighboring plants and a struggle for living space and light begins to take place. This is a natural reaction of seedlings going through all stages of growth to produce seeds. To complete life cycle the plant reaches for the streams of light, because the process of photosynthesis depends on it. The stems do not become thicker, quickly turn yellow and old leaves begin to fall off at the bottom.
Why are tomato seedlings stretched?
If the tomato seedlings are very stretched, then you need:
Such pictures can be observed in most lovers of self-growing seedlings. What to do so that the seedlings do not stretch? What is the way out, and is there any at all? Why is this happening? Of course, there is a way out. Required dive it, that is, tear it off lower part(long root) and plant again); To slow down the growth of seedlings upwards and vice versa, strengthen the growth of roots and strengthen the trunk:
although this is not a problem at all. So the solution
Apparently, you did not grow seedlings correctly: the soil is very poor in nutrients, there is little light, and the room is excessively warm. Accordingly, it is necessary to correct it - to feed (Athlete was correctly advised, but you can use mineral water or organic diluted in water), more light (lateral), cooler ambient temperature. And they plant elongated seedlings at an angle of 45 degrees. - and new roots are formed and the height of the seedlings will not affect its stability. Choose the right soil next time.
I do not agree with the Dachnitsa that top dressing should be started 10 days after germination (!?). The root system is just being formed, top dressing is not needed, in worst case just dangerous. Then a pick, the soil is usually filled with fertilizers. And 10-14 days after picking, it is already necessary to look at the state of the seedlings. If the leaves turn pale (become light green), you can feed with saltpeter or urea (half a teaspoon per 1 liter of water) and increase the lighting. Can be in sunny days take out to the glazed balcony. If there is an effect of nitrogen fertilization, then the seedlings really do not have enough nutrition; then after two weeks feed her with Kemira or any ud-eat for seedlings.
If available bird droppings 15 parts of water are taken for one part of it and mineral fertilizers are not added to the resulting solution. Everyone who wants to enjoy the taste of tomatoes picked on their own in their own garden faces many difficulties, because growing tomatoes at home requires a lot of effort and patience. To receive good harvest tomato, it is necessary to grow very capricious and constantly requiring care and attention seedlings. If you do not take into account all the rules, it is unlikely that she will live to the moment when you need to plant her in the ground. Move to a cool place
Innovative solution
Water and fertilize abundantly When planting tomato seedlings in the ground, it is imperative to deepen the stems. There is no need to make the holes very deep, because after the winter, the earth does not have time to warm up, it is enough to be able to plant on a slope. First you need to form grooves, they should be eight or ten centimeters deep, pour water and wait until complete absorption occurs. After that, you need to spread the tomatoes along the grooves, the tops of the bush should not be closer than fifty centimeters to each other. It is better to lay the roots to the south so that the plant straightens up, reaching for the sun.Create good conditions
Move to a more lit and cool place;
1) rearrange the seedlings to a more lit place, even better on a balcony. This is a pick Elena Smirnova answered very reasonably, seedlings - into the ground and cover for the first time with improvised materials: where with a film, where with lutrasil, where with a newspaper or a can. If you live in a country house, you can just close it with leaky buckets at night, as our grandmothers did.
Tomatoes still have a lot of time. they will increase theirs. I experimented this year too. I have half of the tomato seedlings that came out like this. I planted. but I was already mentally prepared to throw them out. they stayed for 10 days. and then they started chasing good seedlings. haven’t caught up yet, but I don’t call them slugs anymore
garden.guru
The leaves of the tomato seedlings have turned pale. What should I do?
Agatha
The second time to feed 10 days after the first feeding. Very good with Effekton fertilizer (1 tbsp per bucket of water).
Feed, but don't overdo it. Carry out any top dressing 1 time in 7-10 days.
Where the temperature will be about ten degrees and wait until the color returns to normal, then return the seedlings to their original place. As a result, not only the color is restored, but growth also stops a little.
they begin to grow rapidly and stretch upward. Seedlings need to be watered only when the ground becomes dry.
Main reasons:
for seedlings. You need to treat this very responsibly.
summer resident
ventilate the room more often;
2) find a cooler place for the seedlings than where it is now.
.
When planted in the ground, they will become normal. I landed my most frail ones in the OG under agrospan. Now they have a stalk - with a little finger thick. 10-12 degrees at night for tomatoes is normal, you can plant already.
Buy at the kiosk, there are tomatoes that you need ... and throw out your own, they are spoiled
Good growth of tomato seedlings is observed when it is fed with wood ash, which contains a lot of potassium, phosphorus and various trace elements. For 1 liter of water, take 6-8 g of ash and add 1.5-2 g of ammonium nitrate. Such top dressing of tomato seedlings is usually done 10-12 days after the first.
Top dressings are root - when the solution flows into the soil under the plants and foliar - the plants are sprayed with a solution over the leaves. Also, top dressing is divided into mineral and organic. Mineral fertilizers - ammonium nitrate, urea, Kemira-lux, Aelita, Polifid, Agricola, Zdraven and others, as well as wood ash. From organic dressings apply - chicken manure, mullein manure, liquid fertilizers"Ideal", "Chippolino", etc.
Jacob Mittlider came up with an amazing solution to prevent seedlings from stretching out: regular leaf trimming. Tomato seedlings are thus introduced into a state of shock. As soon as the tomato leaves come into contact with a neighboring plant, you need to immediately trim one or two lower leaves. Having experienced a shock, a plant in a week
The temperature should be twenty-five degrees. Sometimes tomato seedlings change color and become pale green. This means that tomatoes
Zoya Alexandrovna
This may happen due to
Gene Abos
When the tomato seedlings are stretched out, the stems weaken, become thin and appear bad smell from tomato. Most people immediately throw out tomato seedlings and buy another, however, do not rush, there is a way to save young plant. What needs to be done so that the seedlings do not stretch out?
If possible, take the seedlings to a heated greenhouse;
Tatyanochka
Of course, you don’t need to rearrange the seedlings abruptly from a warm place to a very cold one, the degree should be reduced gradually.
Elena Akentieva
Elongated tomato seedlings lend themselves perfectly to picking! Since the tomatoes are planted in the process of picking, which we do, we lay the long stems of the tomatoes in the ground and a new powerful one grows on them. root system, which is very good for the subsequent growth of tomatoes.
Tomato seedlings failed. Pale, thin. Packed into cups. How can I help you?
lazybones
For the second time in my life I grew tomato seedlings. Nothing came up that year. This time I sowed often, and they all, damn it, took and rose. There was nothing to dive into, it’s a pity to tear out the extra ones. In general, they grew dead-dead. My husband said - throw it out, buy normal seedlings from the collective farmers, but I did not succumb to provocations. We decided that if they die, we will buy normal ones and plant them - after all, they sell seedlings until mid-June. I brought it to the dacha, planted this dead meat, covered it with spunbond, three weeks passed - they are so strong, large, buds have already appeared on early varieties. Try to land - suddenly everything will work out for you. If they don’t take root, buy on the market.
leopard
Yes, this is not yet a collapse of your tomatoes ... do top dressing, they will take strength.
Antonina Yakovleva
The last time they feed is 10 days before planting tomato seedlings in open ground with a solution of superphosphate (a pinch per 1 liter of water).
Helen
Organic and mineral supplements should be alternated. Mineral fertilizers in a small package (10 g) are supplied with detailed instructions according to the application, which you follow. organic fertilizers dilute so that the solution is yellow color. Use the ash as follows: 1 tbsp. stir a spoonful of sifted ash in 2 liters of water and leave for at least a day. Then drain the clean solution, discard the ashes, feed with this infusion.
always smart
stops growing tall
Boris Stepanov
not enough nitrogen
Elena Smirnova
not enough good lighting
If the tomato seedlings stretched out very much, you need
While there is snow, and I pour seedlings on them, I begin to harden gradually from 0, 2 mm of a layer of snow, I bring it up to 1 cm. The roots of the tomato become thick and purple. Such a plant is no longer afraid of light frosts (up to -2 degrees) and it can be planted earlier in open ground or an unheated greenhouse.
Evgeny Kondr
Since it will become lighter and cooler, the seedlings will stop reaching for the light, i.e. up, and will become stronger at the root and strengthen the trunk of the plant.
Tatiana Harsh
Therefore, if your seedlings stretched out immediately after germination, this is not a big problem. But if tomato seedlings are pulled out after diving, then this can complicate transplanting into the ground, especially if you need to transport seedlings.
Ludmila Gushchina
They need to be planted, 10 grams at night - normal - nothing will happen to them. We have the same temperature at night. , and in the afternoon 20-22 ---- I planted everything in the OG, the tomatoes were already sipping - they were blooming, the eggplants had begun to turn green, otherwise they had already turned yellow in the cups, like chlorotic ones, I planted them before everyone else, so as not to suffer, first under the film , as the frosts ended, then the film was removed.
VinOlga
Plant lying down! And they will grow up and be strong, do not chew!
Irina Shabalina
Whatever you choose to feed, do not forget to wash off the solution from the leaves so as not to burn them.
◄non-GMO
After any top dressing, water everything a little. clean water. If you exceed the concentration of the solution, this watering will correct your mistake.
What to do if tomato seedlings are very stretched immediately after germination?
.Lilechka
Beautiful glade
. In nature, everything is thought out: if there is not enough light, you need to reach for it. In winter, daylight hours are reduced, respectively, plants need additional lighting. cut into two pieces Your seedlings are stretched out because they do not have enough light, you need to illuminate them with a fluorescent lamp. If it is stretched out too much, throw it away, it will no longer be of any use. When you plant the next one, feed it with special fertilizer for seedlings, it does not allow it to stretch. I don’t remember the name of the fertilizer, ask in stores where the seeds are sold, tell me what you need for seedlings so that they don’t stretch out. glazed balcony and it is warm enough to take out seedlings. a balcony door do not close the room. You still need not to chase early varieties and grow seedlings to suit your climate. Of course the best place for growing seedlings, these are windows to the south, because it is necessary for seedlings to provide maximum daylight hours, plus add lighting with a lamp after dark.
plant immediately. But I would not water with an athlete, a tomato is like a weed, if you plant it lying down, it will quickly give lateral roots and catch up with its own. Just fertilize the bed, not sparing, with humus.
Well, if there is enough sun, let them harden! I live in Vladimir, 170 km east of Moscow. For a month now, tomatoes have been standing on the street under a car shed, slowly transporting them to the dacha, burying my neck there. Even the weak are so strong! They stand gray with emerald leaves and gain color! Eh! it was necessary to listen to the Legend and even then landed on the dacha! Simply stupid! He probably cracks salads in St. Petersburg!))) So plant a couple of bushes of your tomato lying down (I dug the first flower brush) and they will gain strength from you, releasing a new root system. And if the cold comes, so what? We live in a zone of risky agriculture! Moreover, something incomprehensible is happening with the climate and ecology! Good luck!)))
While writing, I learned about the explosions in Moscow. Lord, when will this end?
IrinaMZ
To make the seedlings stretch less, add soil and pinch a couple of lower leaves.
The stem thickens when the plant stops growing in height, which is exactly what is needed in order to grow powerful, stocky seedlings. You need to understand that this operation is carried out when at least one leaf has formed at the points of growth. Repeated pruning will improve the result and tomato seedlings with strong and thick stems will surprise everyone. Even cotyledon leaves are often cut off and this always leads to an exclusively positive result.
Methods for preparing top dressing for tomatoes:
Feride 333
each stalk of a tomato. The cut should be done after the fifth leaflet. top plants need to be put in a jar of water, for the formation of roots, this happens within one week. After the root system has appeared, the upper parts of the tomato must be placed in pots for seedlings. The result is another seedling of tomato and it can also be grown outdoors.
In such cases, I do not throw away the seedlings, I let it grow further. When planting in the ground on the street, I break off the lower leaves, let them dry for about 10 minutes, then plant them lying down, sprinkling the stem with the torn leaves off the ground. A tomato planted in this way acquires new roots and becomes stronger.
Seedlings are stretched out due to lack of light. If stretched out, sprinkle and illuminate. Additional lighting is best done with LED lamps. They have an efficiency of up to 90%. it slows down growth and contributes to the thickening of the stem.
Of course, in the best case, you need to prevent pulling seedlings, but if it happened, then there are several options to deal with this problem.
I think that you did not mean fertilizers, but retardants that inhibit plant growth, for example, "Athlete". - over a year ago
Nilama
Sprinkle Athlete - you will see how in 5 days the seedlings will get stronger. Instructions for use and doses on the package. The method has been proven repeatedly.
fserg
Feed with iron - ferovit for example
nadin755
Illumination is of no small importance for the development of seedlings. The farther your seedlings are from the light source, the more they stretch. And the closer your seedlings stand on the windowsill, the more it stretches. Do not worry if the neighbors have seedlings of 10-15 cm, and your tomatoes have just sprouted. There's still a month and a half to go. During this time, you can grow healthy strong seedlings. After all, you probably planted early ripe varieties.
angry
Tomatoes are the most common vegetable plants in the world. There is very little information about their origin, many scientists believe that the birthplace of this fruit is Peru and the mountainous regions of Ecuador. Tomatoes are very
Olga285
- too much density of plants
- After a while, small stepchildren and shoots begin to appear near the axils of the leaves. It is necessary to wait until the upper shoots reach five centimeters in length, after which it is necessary to remove the lower stems. This must be done
- You don't need to throw it away. It must be sprinkled with earth so that it does not break and it will continue to grow. We also have little light in the apartment. But of course, look for a place to have more light.
- If stretched out, immediately pour in the earth to hide the "long trunks", it is advisable to put it on the windowsill (in a bright place). it is better to grow seedlings at temperatures below room temperature (it also climbs from heat)
- The first option involves drowning the stem into the ground, if the seedlings grow on the street, then the earth has not yet warmed up much, so it is better to plant the plant on a slope.
Sooosolnechnaya
There may be the following reasons: little light and a lot of heat. Most likely your seedlings are standing in warm room on the windowsill. And under the windowsill there is a radiator battery, from which it's warm. With an excess of heat, the seedlings will grow faster upwards, and with a lack of light, this growth will be unhealthy - the sprouts will be thin, pale and weak. This can also happen if the plants are planted very close to each other. Therefore, seedlings must either be planted less often, or thinned out on time, leaving the most strong plants. Keep in a place where it is light, but not very warm. If necessary, illuminate with fluorescent lamps.
Growing, it is important to create as much as possible favorable conditions for its growth and development, since otherwise the gardener will inevitably face various kinds of troubles. So, for example, it often happens that the leaves of tomato seedlings seem to turn white for no reason. What can this condition indicate, what contributes to its appearance and how to restore a healthy appearance to seedlings?
Sunburn
Spots of white, localized on the leaves of tomato seedlings, as well as a whitish hue between the veins of the leaves, most often appear due to the plant getting a sunburn. Perhaps the seedlings were left under the direct rays of the sun, or the tomatoes were taken out onto the balcony, where they first got unsuccessfully acquainted with the sun.
There is also another type of sunburn, the cause of which is the splashing of water on the foliage of seedlings during irrigation. If you do not gradually accustom tomato seedlings to ultraviolet light, then it is possible that sunburn plants will receive even after transplanting into a greenhouse. At the same time, at least the leaves will turn white and soon fall off, as a maximum, the seedlings will die.
Even if a part of a seedling leaf has received a burn, then this will not pass without a trace for the plant: the affected area will not take part in photosynthesis, and the plant itself will be forced to spend a lot of energy on a full recovery. At the same time, interestingly, the first symptoms of a sunburn will manifest themselves only after a couple of days. In order to avoid getting a sunburn, it is necessary to accustom the seedlings to the sun gradually, taking them out to the balcony for 10-15 minutes and gradually increasing this period of time.
Soil salinization
Another reason why on the leaves of tomato seedlings may appear white coating is increased soil salinity. This condition of the soil can be diagnosed visually.
To do this, you need to carefully look at the soil; when salinized, a yellowish coating in the form of grains can be found on its surface. In order to save seedlings, it is necessary to remove upper layer soil, replacing it with a new fertile soil, then water exclusively with filtered water, which should flush the soil.
What to do
If the tomato seedlings have turned white due to exposure to the sun, then you should not try to return the leaves to their former green color. However, there is a set of measures that allow tomato seedlings to recover and gain green mass.
So, for example, in the evening, at sunset, it is recommended to treat seedlings with Espin or another drug that has a similar effect. This manipulation should be carried out once a week for three weeks. It is also necessary to provide the plant with the proper amount of nutrients. It should be borne in mind that tomato seedlings that have survived a sunburn will begin to bear fruit later than its healthy species.
Yellowed leaves are the first signs that the plants are not comfortable. Yellow leaves seedlings may also indicate the appearance of the disease. There can be several reasons why tomato seedlings begin to turn yellow.
Yellowing of tomato seedlings is quite common. Strong seedlings suddenly begin to turn yellow, wither, spots appear on the leaves, the upper tips begin to curl. To get rid of these problems and help the plant recover, you should understand the cause of the appearance of a bad disease and do everything necessary measures for its prevention.
There are many reasons for yellowing. In order to take action, you first need to figure out why the leaves began to turn yellow.
The most common mistakes in care and landing
Yellowed leaves signal the appearance of problems associated with the wrong care.
The main reasons are:
- Lack of sunlight and excess moisture
- Frequently sown seedlings
- Micronutrient deficiency
- High acidity of the soil
- Lack of space after disembarkation
Often seedlings in the northern and middle regions suffer from a lack of light. Abundant watering exacerbates the situation, and the leaves begin to turn yellow.
Often sown seedlings also cause a lack of light. It grows, grows stronger, begins to block the sunlight with foliage.
Micronutrient deficiency leads to yellowing. Trace elements leading to yellowing:
- Potassium
- Magnesium
- Iron
- Manganese
If the earth too salty the leaves will also start to turn yellow. Salt soil can be identified by white or yellowish spots that stand out on the surface of the earth - plaque.
Incorrectly selected container- the cause of yellowing. If the container is too small, the growing roots become crowded, the seedlings begin to hurt, the leaves turn yellow.
If the roots of the seedlings are crowded, the tomato can get sick What to do if the leaves of tomato seedlings turn yellow
Having dealt with the causes of yellowing, consider ways to prevent them.
With a lack of sunlight, seedlings put on sunny side window sills. For additional lighting use lamps that extend the daylight hours at home by 5 hours.
seedling material needs to be watered properly.
Improper watering also leads to yellowing. With a lack or excess of moisture, the seedling material turns yellow. Watering is rare, but plentiful.
If planting is too frequent, shading occurs, transplanting into separate pots will help fix this.
- If there is not enough nitrogen, the leaves turn pale, fall off, new ones grow smaller. Fertilizing with nitrogen will eliminate nitrogen deficiency.
- If new leaves become curly, and older ones turn yellow and fall off, it is necessary to water or feed with potassium nitrate.
- The leaves turn yellow between the veins - lack of magnesium. Spraying with magnesium nitrate will fix the problem.
The appearance of brown spots indicates a lack of zinc. New ones become stained, dry, fall off. A solution of zinc sulfate will correct the situation.
- If they turn light green or even White color, seedlings do not have enough iron. Requires top dressing.
The leaf lacks manganese, it begins to turn yellow at the base, turns staggered. In this case, you can fertilize and spray the plant with a solution of potassium permanganate.
If the leaves turn yellow between the veins, there is not enough magnesium. The earth can become saline when watering with hard water or an excess of fertilizers. In this case, the earth is removed from the surface by 3 cm and watered with soft or rain water. It will be possible to feed only after a few weeks.
Seedlings that have turned yellow due to lack of space for the roots can be saved if they are planted in deeper and more spacious containers.
Diseases
The cause of the appearance of yellow leaves of tomatoes can be the occurrence of diseases.
Appearance yellow spots causes a fungal disease called fusarium. Leaves with this disease not only turn yellow, but also wither. The seedlings are sprayed with Fitosporin 2-3 times, after 1-2 weeks the procedure is repeated.
Often tomato seedlings are affected by the disease blackleg. It occurs with excessive watering. The roots become thin and black. To prevent the occurrence of a black leg, you should observe temperature regime and proper watering.
A common tomato disease that also affects eggplant, potatoes, peppers is called Phytophthora. Phytophthora occurs when excess moisture and low temperatures. Brown spots appear. Late blight develops very quickly, it is urgent to take action.
A solution will help to combat phytophthora table salt. To do this, 0.5 tbsp of salt is dissolved in 5 liters of water and the seedlings are sprayed.
Why leaves turn yellow
Understanding the reasons is not so difficult, if you pay attention which leaves of the seedlings turned yellow. There are several reasons for the yellowness of the lower leaves:
- Overwatering
- lack of light
- Excess fertilizer
cotyledon leaves may turn yellow due to heavy watering. The roots of the plant begin to suffocate in the water and they begin to turn yellow.
Tops the tomato turns yellow with a lack of phosphorus.
There are other factors that can lead to yellowing of the leaves.
After transplant
Seedlings may turn yellow after transplanting. The fact is that the plant needs time to acclimatize in a new place.
In this case, shade it for a couple of days from the sun.
On the windowsill
If the seedlings are on the windowsill, the cause may be sunburn. In this case, it is necessary to protect it from direct sunlight.
After the pick
Leaves may turn yellow after picking. Some gardeners when picking too much damage to the roots seedlings, which leads to stress.
After landing in the ground
It is necessary to plant seedlings of tomatoes in soil containing a sufficient amount of copper, which is necessary for the normal growth of tomatoes. With a lack of copper, it begins to turn yellow.
In the open ground
In open ground, seedlings may begin to turn yellow due to a lack of trace elements in the soil.
Yellowing may be caused weather . Too cold weather disrupts the metabolism of the plant. In hot weather and rare watering, tomatoes can get burned.
What is missing tomato seedlings
Seedling material must be constantly monitored, even a slight change in the color of the plant signals changes or even the onset of the disease.
Important feed properly and on time. The first time she is fed when the first true leaf appears. The second time - 7-10 days after picking.
What to feed
The first dressing is made from copper solution. Top dressing is carried out after one true leaf appears. To do this, prepare a solution of copper at the rate of 1 tsp. copper per 1 liter. water. Seedling material is watered with the prepared solution. Thus, seedlings will be processed from phytophthora.
For good growth seedlings need nitrogen. The second dressing is done 7-10 days after picking. For top dressing, urea is used. 1 st. l. urea per 10 liters. water. Abundantly water the seedlings with a solution.
Even the slightest changes should not be ignored, because it speaks of improper care and can also cause diseases. With the correct determination of the cause of yellowing, it will be possible to prevent problems and grow strong, healthy seedlings.