Growing cucumbers through seedlings: available even for beginners
Cucumbers are thermophilic plants, but they are grown almost throughout our country. In most cases, they are sown with seeds directly in the garden, but pre-growing seedlings at home is also quite popular to get early production. It is not too difficult to do this, the seedlings are on the windowsill for about a month, the conditions in a city apartment are usually quite suitable for its growth.
To sow cucumber seeds for seedlings, it is necessary to prepare in advance the seeds themselves, the soil mixture and containers in which the seedlings will spend a month of their life. Regarding the containers, everything is unambiguous: it is impossible to grow cucumbers in common boxes, they categorically do not tolerate a transplant with a violation of the root system. Therefore, they require individual cups. Their volume should be from 300 to 500 ml; however, some gardeners grow cucumber seedlings even in eggshells.
And yet, to get high-quality seedlings, you should not be limited in the size of the cups. Their design should be such as to allow the seedlings to be removed without damaging the soil coma. Reusable cups with a retractable bottom are perfect in this regard, but peat pots that are buried in the garden along with all the contents are ideal.
Each plant has its own personal cup
Light, acid-neutral, moisture- and air-permeable soil is placed in the pots. Since it may not come to top dressing in a month, the soil should immediately contain a sufficient amount of nutrients. When growing a dozen seedlings, it is easier to buy ready-made soil in the store, but it should be designed specifically for cucumbers. There is no need to rush to the cheapest options: unfortunately, in such packages they still often sell land from under the fence. It is not required to prepare additional soil from a serious manufacturer.
In the case of self-preparation of the nutrient mixture, the best option is sod land, good compost, peat and sand (ratio 2: 2: 1: 1). Of course, options are possible: the farm does not always have everything you need. Sawdust is also used as components of the mixture, sand is replaced with vermiculite, etc. Good compost or humus has a sufficient amount of fertilizers, but if these components cannot be obtained, any soil must be flavored with wood ash (glass on a bucket of soil) and add about 50 g azofoski.
If the land is taken directly from the garden, the soil must be disinfected. The easiest way is to water it generously with a pink solution of potassium permanganate a week before sowing the seeds. If suddenly it is not, you can replace it with copper sulfate. After drying to a state convenient for work, the soil is poured into cups, placing a centimeter layer of drainage on the bottom, and allowed to settle for a day.
The timing of planting cucumbers for seedlings
It is very easy to calculate the optimal time for sowing seeds in cups, but it is impossible to give a specific recommendation. From the moment of sowing seeds to planting seedlings in the ground, 30–35 days should pass. And then it all depends on what climatic region we are talking about and where they are going to grow cucumbers: in a greenhouse or in unprotected soil.
If we are talking about the middle lane and consider planting seedlings in open ground, then without fear you can do this only at the beginning of summer. This means that the seeds must be sown at the very end of April. If temporary film shelters are envisaged, everything can be moved a couple of weeks and sowed in mid-April. Well, if there is a good greenhouse, it will be possible to plant seedlings in it already at the beginning of May, which means that seedling business begins around April 1.
In more northern or southern regions, the terms, respectively, are slightly shifted in one direction or another. But in the south, seedlings of cucumbers are grown only for very early consumption of products: in order to eat cucumbers at the usual time, they, without hesitation, are sown in a garden with seeds.
When to plant cucumbers for seedlings in 2019 according to the lunar calendar
Many gardeners check the dates of their summer cottages with the phases of movement of the heavenly bodies. Since about 1990, many newspapers and magazines, and later - Internet portals, have published numerous lunar calendars, in which auspicious and forbidden dates are given for one or another work with a particular garden or horticultural crop. The trouble is that these dates vary greatly in different editions. Therefore, you have to analyze many sources and make a certain right decision for yourself.
So, for example, many sources call 18, 21, 22, 23, 26, 27, 28, 31 May as favorable dates for sowing cucumbers in 2019.
If you still want to link sowing with the phases of the moon, you should know that sowing cucumbers is recommended to be done during the growing moon, closer to the days of the new moon. It is believed that during such periods, the growth processes of many crops are activated, which has a good effect on both the germination of seeds and the size of the future harvest.
Growing cucumber seedlings
Since in many modern varieties and hybrids, the first cucumbers ripen within 33–38 days after germination, the need for growing seedlings is often far-fetched. But if you want to crunch your own products as early as possible, our summer resident will definitely prepare at least a few bushes of seedlings.
Unlike, for example, cabbage seedlings, which need cool rooms to grow, a cucumber feels good at the same temperature as a person, so seedlings can be cooked at home. But if there is a greenhouse or greenhouse nearby, to which there is daily access, gardeners prefer to grow seedlings in them.
We will assume that we live far from the dacha, visit it only on weekends, and therefore we are going to grow a dozen bushes in a city apartment. It is necessary to select the most lighted window sill for this.
Seed preparation for sowing
Fortunately, you do not need to buy cucumber seeds every year: they remain viable for 7–8 years. Moreover, fresh seeds are slightly worse than those that have been lying for two or three years: they have more barren flowers. Seeds at the age of 2–4 years are optimal. True, modern hybrids may not be so, but this is a rather confusing story, like the story of where several hundred varieties and hybrids suddenly appeared on the shelves. Are they so different from each other?
Therefore, the current summer residents are divided into two groups. Some firmly believe that hybrids (F1) are many times better and plant only them, annually testing all kinds of new products. Others from year to year grow old proven varieties and store their seeds from them, selecting for this purpose necessarily tetrahedral, and not triangular testes (yes, if you look closely, ripe cucumbers are not entirely cylindrical!). Which of the summer residents is right? It seems that the truth is somewhere in the middle. It is only clear that most hybrid seeds are sold ready for sowing, and you need to tinker a little with your own.
The entire list of stages of seed preparation looks like this (but not all of them are required):
- Calibration. This can be done manually: the seeds of a cucumber are quite large, and the most puny ones are easily identified with your fingers. It is even easier to dip the seeds in a solution of table salt (half a tablespoon in a glass of water), shake and wait 3-5 minutes. The weakest ones will emerge, they are not worth sowing.
The seeds of cucumbers are large, you can touch each seed individually
- Warming up. If you have just bought, fresh seeds on your hands (or their origin is unknown), before sowing, you should hold them for a couple of days by the radiator, which reduces the proportion of male flowers on which there are no fruits.
- Disinfection. For seeds from reliable companies bought in a specialized store, this operation is not necessary. You need to hold your seeds or from your neighbors for 15–20 minutes in a strong solution of potassium permanganate. After this operation, the seeds should be rinsed well with clean water.
To disinfect seeds, a strong solution of potassium permanganate is required, almost 1%
- Soaking in fertilizer solutions or growth stimulants. This is not a mandatory procedure, but some amateurs use various preparations for this. The most natural is ash infusion or agave juice diluted 5 times with water.
Epin and Zircon are some of the most convenient stimulants to use
- Swelling in water. Even those seeds that are not processed in any way, many gardeners try to at least soak before sowing until they swell. The seeds are kept in warm water for a day (from 20 to 30 aboutC), after which they are slightly dried so that they easily crumble during sowing. This measure can speed up the emergence of seedlings only by a day, therefore, it is also very controversial if necessary.
- Hardening. But this is reasonable. Although on this issue, many scientists are not unanimous, believing that hardening of seeds has almost nothing to do with hardening the plants themselves. It makes no sense to harden seeds for planting in a greenhouse, but for open ground this operation is popular. Hardening in the case of cucumber seeds is carried out by keeping the soaked seeds in a wet cloth in a refrigerator for a day.
- Germination. This is done most often in wet sawdust before the appearance of the primary root - half the length of the seed. True, germinated seeds are more difficult to sow, but a couple of days are won.
Sometimes the matter is even brought to the appearance of leaves, but it will be very difficult to plant such seeds.
Is it possible not to do anything from the above list? You can, the seeds will sprout dry, only a little later. Therefore, it is necessary to choose only those steps that seem necessary in each specific situation.
Sowing cucumber seeds
Sowing cucumber seeds in cups with soil mixture poured into them is not difficult.
- They put 1-2 seeds on the surface of the soil poured with water (no matter how much it is not a pity: after all, some seeds are now sold even by the piece!).
Expensive seeds are sown one at a time: most likely, they have good germination
- They are covered with a layer of soil about 1.5 cm thick.
- Spray the surface with a spray bottle with water.
The gardener on the farm always needs to have the simplest spray bottle
- They put the cups in any convenient tray, cover with glass or film and transfer to a warm place (optimally with a temperature of 25-28 aboutFROM).
Glass will create a greenhouse effect and prevent the soil from drying out
The emergence of seedlings of cucumbers can be expected in 4-8 days, depending on the variety and conditions. A few days after that, the worst plants must be carefully removed, or better - cut with scissors.
Cucumber seedling care
Before the emergence of seedlings, care must be taken so that the soil does not dry out. Opening the glass, slightly ventilate the crops, and, if necessary, spray from a spray bottle. The best place for cucumber seedlings is a well-lit, warm windowsill. As soon as shoots appear, the glass must be removed, and the temperature must be reduced to 18 aboutC, at night a few degrees lower, and keep it that way for five days. This is the most difficult thing: by this time, as a rule, it is already getting warm, but if such conditions are not found, the seedlings will stretch out and will be very weak.
Subsequently, the optimum temperature is about 24 aboutHappy and 18 aboutWith the night. And - more light. If the sun is not enough, the obligatory illumination with fluorescent lamps or diode lamps. The cucumbers on the windowsill need space, the bushes should not touch each other, so the cups need to be pushed apart from time to time. The rest is in the care of the seedlings - as for any vegetable plants.
When the window sills run out, the tables are also forced to seedlings, but here you can't do without lighting.
Watering seedlings after emergence
Water the cucumber seedlings only with warm water (about 25 ° C). At the same time, the soil should always be slightly moist: any stagnation of excess water, especially in the case of insufficient heat, will certainly lead to rotting of the root system. The frequency of watering depends on the nature of the soil and temperature conditions, but this should not be done on a daily basis.
After watering, experienced gardeners always pour dry, clean sand closer to the roots. You don't need a lot of it, just a millimeter layer is enough: sand, as it were, performs the function of mulch, and at the same time prevents rotting of the lower part of the stem.
Often, when growing seedlings of cucumbers, they do without feeding at all. If the soil mixture has been formulated correctly, the cucumbers have enough nutrients until they are planted in the ground. Top dressing is needed only if the seedlings have stopped growing, the leaves have acquired an unnatural color, etc. Of course, this may also be due to diseases (mainly from violations of water and temperature regimes), but, most likely, food has been consumed.
In most cases, pouring ash infusion over the cucumbers is enough. If there is no ash, use any complete mineral fertilizer (preferably with a trace of boron). It is safer to apply foliar feeding. To do this, the leaves of the seedlings are sprayed with a weak solution of any complex fertilizer (as written on the package). In this case, you must carefully monitor the concentration of the solution so as not to burn the leaves. After any feeding, the seedlings are well watered, not forgetting to add some sand after that.
There is nowhere to take ash in a city apartment, so it is worth stocking up on it in the fall after the next barbecue
Is it possible to pick cucumber seedlings
Picking cucumber seedlings in the classic version (with pinching of the central root) is categorically unacceptable. But sometimes you still need to transplant the seedlings into another container. This can be done no earlier than when the first real leaf is cut through. Such a need may arise in the following cases:
- too small containers taken during sowing;
- strongly elongated seedlings;
- overgrown seedlings due to an incorrectly calculated time for sowing seeds;
- seedling diseases.
In the first three cases, the transplant is carried out by the transshipment method: after good watering of the seedlings, the earth is allowed to dry out somewhat so that the soil lump grasps, and the entire contents of the glass are transferred into a larger pot, adding earth. Since the root system hardly suffers in this case, the likelihood of success is high; sometimes cucumbers don't even stop growing. With such a transplant, it is possible to slightly deepen the seedlings (especially if they are stretched out) by placing them in the ground almost by cotyledonous leaves. Of course, after transplanting it must be well watered and transferred to twilight for a couple of days.
In case of illness, most likely, the soil is also infected, so the plants will have to be transplanted almost without an earthen coma, and the likelihood that everything will go well is small. But gardeners often try to save seedlings in this way. After watering, it is carefully removed from the cup with a minimum amount of soil, but trying to preserve the roots as much as possible. More careful care is required for such seedlings. For the first time, it is placed not only in partial shade, but the temperature is also raised somewhat. If everything went well, the seedlings return to normal conditions after a week.
Planting cucumber seedlings in open ground
Seedlings of cucumbers at home are no more than a month. From this time, for the first few days, it is kept at a low temperature, then in comfortable conditions, and in the last week they begin to accustom it to living conditions in the open ground. To do this, the seedlings are first taken out onto the balcony for 15–20 minutes, then the walking time is gradually increased. But the temperature should not be too low, 10-12 aboutHappy day is already stress.By the time of planting in the garden, the seedlings should be on the balcony for up to half of the daytime.
A good seedling of cucumbers, ready for planting in a garden, should have at least three large dark green leaves and a strong but short stem. It is very good if buds have already been outlined on it (which, of course, does not happen with three leaves), as well as antennae. But the flowers are undesirable to open at home.
Before transplanting into the ground, seedlings are well watered. There are different planting schemes, it depends on the variety, but you should not thicken the planting. Most often, cucumbers are planted in an ordinary way, leaving a distance of 40-50 cm between rows, and 25-30 cm between plants in a row. A denser planting does not always lead to an increase in yield, and vice versa. Naturally, the garden bed must be ready long before planting the plants: it is well filled with fertilizers, primarily organic ones.
The time for planting cucumber seedlings in open ground is determined not so much by specific dates as by the state of the weather, and the seedlings are moved to the garden without shelter in the middle lane not earlier than the beginning of summer. They try to plan the landing on a cloudy day. The transplant process is simple:
- Before planting, loosen the garden bed again and level the soil with a rake.
Before the last leveling, the bed can be sprinkled with ash again.
- In the places designated according to the selected scheme, they dig holes with a scoop somewhat deeper than the size of the cups with seedlings.
- In each well, half a glass of wood ash and a tablespoon of azofoska are added as a local fertilizer, mixed well with the soil and 1-2 liters of warm water are poured.
Often, holes are even dug with a shovel to add more local fertilizers.
- Gently removing the seedlings from the glass, they lower it into the hole. Peat pots are buried along with all the contents. A slight deepening of the seedlings, up to the cotyledon leaves, is possible, but in this case they try to place it obliquely so as not to bury the root system too deeply.
When the seedlings are good, they are hardly buried.
- The plantings are carefully watered with warm water, the soil is mulched with any loose material, and if the weather is not yet quite summer, they temporarily cover the garden with spunbond or lutrasil.
Planting cucumber seedlings in a greenhouse
Preparing a greenhouse for planting cucumbers is more difficult than preparing open field beds and can include:
- Disinfection of the greenhouse, carried out in the fall. If there were no diseases, the soil is simply watered with a solution prepared from copper sulfate and karbofos (1 tablespoon per bucket of water). If the disease raged, all the soil is changed to a new one.
- Filling the garden with fertilizers (in April). In the greenhouse, the amount of fertilizer is applied even more than in unprotected soil.
- Formation of high beds (up to 30 cm in height) of a convenient width (usually 80 cm).
- Warming up the beds a week before disembarking the seedlings. The garden bed is watered with hot water with the addition of small amounts of mullein or bird droppings (1-2 handfuls per bucket of water) and covered with foil.
- Arrangement of trellises: in the greenhouse you need to save space. And if in the open field not all gardeners grow cucumbers in a vertical culture, in a greenhouse this is the generally accepted approach.
The planting of seedlings itself is no different from that in the case of unprotected soil and is possible when a daytime temperature of about 20 is established in the greenhouse. aboutFROM.
In greenhouses for cucumbers, support must be provided.
Further care for cucumbers
In cucumbers, the root system is located at a depth of 5 to 25 cm.With an increase in air temperature and in the absence of rain, the ridges dry out quickly, therefore, cucumbers need regular watering with water heated in the sun during the day. Cucumbers are watered in the evening, usually every other day. It is best to water with a watering can without a strainer so that the water does not splash and fall on the leaves. After each watering, the soil must be slightly loosened, and if necessary, the plants must be piled up. Constantly fighting weeds.
After the appearance of the fifth true leaf, the plant is pinched to cause the development of lateral shoots, on which the bulk of the crop grows. True, for many modern hybrids, pinching is optional, but it will not hurt.
By the time the cucumbers begin to bloom, their first feeding is timed. To do this, take a nitrophosphate (30–35 g per bucket of water) and pour at least a glass of such a solution under each plant. The second feeding is carried out when they see that after the amicable growth of the fruits of the lash, growth noticeably slows down and fruiting dies out.
Cucumbers are most conveniently grown on trellises, but they do not always climb on their own where the owner would like, so from time to time it is necessary to direct the lashes and sometimes even tie them up. The crop must be removed systematically, sometimes it has to be done daily. Otherwise, the cucumbers will outgrow, and new ovaries will stop forming.
Do not let the cucumbers overripe, otherwise the yield will sharply decline
Diseases and problems when growing cucumber seedlings
When growing cucumber seedlings at home, you must adhere to all the rules in terms of temperature, illumination and soil moisture. If something has been violated, diseases are possible, sometimes they end in the complete death of the seedlings. So, pulling seedlings cannot be considered a disease, but it can be lost even because of this, completely harmless option, which is very easy to avoid. Sometimes, to prevent the plants from stretching, it is enough just to wash the windows.
Signs that something is wrong with the seedlings may be:
- yellowing of the leaves;
- thinning of the stem;
- curling the leaves;
- stopping growth;
- wilting leaves.
In each case, it is difficult to pinpoint the exact disease, since there can be many of them, and the symptoms often overlap. The entire possible list looks impressive:
- root rot;
- white rot;
- powdery mildew;
- white mosaic.
These are not all diseases, and for the diagnosis and treatment of seedlings it is necessary to delve into the literature: in some cases, you can try to save the plants, but often it is impossible to do this. The most common options found at home look like this.
Cucumber seedlings fall and wither
It is not always a disease. Perhaps the plants simply do not have enough light. We need to tell a powerful fluorescent lamp over them, and everything can return to normal. Perhaps the grown bushes are already shading each other, then the cups just need to be arranged more freely.
Unfortunately, there are a lot of reasons for seedlings wilting, but in some cases it can still be helped.
Of course, wilting is possible simply with hot weather and a lack of moisture, then the seedlings need to be well watered. Sometimes she does not have enough food, which means that it is worth adding a little complex fertilizer to the irrigation water. But even from an excess of nutrients, oddly enough, the death of seedlings is possible, so you cannot overdo it in this matter either.
In the case of fusarium wilting, that is, a dangerous disease, unfortunately, it will no longer be possible to help. But in any case, you can try to transplant plants that are just beginning to fall into fresh soil.
Why do the leaves of seedlings turn yellow
Yellowing of the leaves can also indicate a whole range of problems: from banal non-compliance with agricultural techniques to dangerous diseases. At home, most often the leaves turn yellow due to poor soil, in which there is an elementary lack of nitrogen. If so, simply spraying a mild urea solution over the leaves can save the day. But yellowing happens not only due to a lack of nitrogen, but because of the wrong balance of all nutrients, and here nothing can be done without analysis.
Yellowing of seedlings is not always a disease, sometimes it just does not have enough nutrition
Yellowing of the leaves is also possible due to too low temperatures, especially at night, as well as due to lack of natural light. It is very easy to fix this. Other reasons for the yellowing of seedlings are so varied that it is impossible to highlight them within the framework of a short story.
What to do if pests appear
The most common pests in cucumbers are:
- melon aphid;
- root-knot nematodes;
- spider mites.
However, they mainly attack plants in the garden, and can only get home with soil, which is impossible with proper preparation for sowing. At home, miniature collembola worms can also be found, which gnaw the small roots of the seedlings. In any case, various insecticides are effective against pests, the most universal of which is Aktara.
Video: planting cucumber seedlings in the garden
Growing cucumber seedlings is not always a mandatory event; they resort to it to get earlier harvests. Since the main amount of cucumbers can also be obtained from direct sowing of seeds in a garden bed, for an average family it is enough to grow no more than a dozen seedlings. Every summer resident can afford this, and it is not at all difficult to do it.
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Planting seeds and seedlings of cucumbers in a greenhouse: terms, rules, schemes
Growing cucumbers in a greenhouse allows every gardener, regardless of the region of residence, to get a large and tasty harvest. One of the most important components of success is the correct planting of cucumbers (both sowing seeds and planting seedlings). Let's take a look at how to prepare a greenhouse and garden bed and plant a crop correctly.
Note! For planting in a greenhouse, it is necessary to choose self-pollinated cucumber varieties.
When to plant cucumbers for seedlings in 2018 at home
Cucumbers are grown everywhere, not only for their unpretentiousness and rich taste. This also happens because they bring many benefits to the human body. Cucumbers contain iodine, fiber, iron, sodium, and so on. Therefore, they improve digestion, thyroid function, and increase immunity. Cucumbers contain a large amount of water, which helps to quickly quench your thirst in the hot season. In order for cucumbers to please you with a bountiful harvest, you need to plant seedlings on time. And for this you need to do some calculations.
As for determining the timing of planting any seedlings, you will need to do a reverse calculation. To begin with, determine the time of planting plants in open ground or in a greenhouse. Usually in the middle lane this happens in May. And for growing cucumber seedlings at home, it will take about 30-40 days. Therefore, it is best to plant from late March to late April. This time depends on the climate in a particular region and on the conditions for further cultivation. The minimum soil temperature should be +15 degrees.
In more detail to choose the day when to plant cucumber seedlings in 2018, the Lunar calendar of the gardener and the gardener will help.
If you analyze it, you can calculate the most favorable days for this process.
Auspicious days for cucumber seedlings in 2018
- March 20, 21, 24, 25, 26
- April 17, 18, 21, 22, 27, 28.
On other days, planting can be carried out, but undesirable. In general, cucumbers are aboveground fruits, so it is preferable to plant them on the growing moon.
Lunar calendar for planting cucumbers for seedlings in 2020
The planting date can also be found by the lunar calendar, which many gardeners take quite seriously.
Cucumbers should be sown with the growing moon. It is at this time that all plant juices rush upward.
It is useful to know the days of the full moon - it is not recommended to carry out any gardening work in them, however, it is good to harvest, as the juice begins to rush to the fruits.
Cucumbers can also be grown on a windowsill. To do this, they can be landed at the following numbers:
- January: 17-20, 27-29
- February: 1-3, 5-8, 14-16, 28, 29
When else to sow for seedlings:
- March: 2-6, 12-14, 26-29
- April: 1, 2, 24, 25, 27-30
Favorable days for performing maintenance work
Terms of work on cucumber seedlings according to the Lunar calendar 2020
|Month||Numbers of the month||Recommended jobs|
|March||2, 3, 14, 15, 29, 30||Watering seedlings|
|14-16, 19-21, 24-26||Extermination of pests and pathogens|
|April||9-13, 15-17, 20-22||Weeding works, planting thinning|
|2-5, 11-13, 15-17, 20-22, 25-37||Extermination of pests and pathogens|
|May||12-15, 17-0, 22-25||Weeding works, planting thinning|
|6-15, 17-20||Extermination of pests and pathogens|
|June||6-11, 14-21||Weeding works, planting thinning|
|2-6, 9-11, 16-19||Extermination of pests and pathogens|
When, according to the lunar calendar, to plant seedlings in the ground and greenhouse
When to plant cucumber seedlings or sow seeds in the ground according to the lunar calendar 2020:
- April: 1, 2, 24, 25, 27-30
- May: 2-4, 6, 15-17, 20, 21, 25, 31
- June: 2-4, 11-14
On May 19, abundant dew and clear weather - to a bountiful harvest of cucumbers!
On May 27, clear weather marks a good harvest of cucumbers.
What other seedlings are you planning to plant?
Fresh cucumber seeds that were harvested last or the year before last have a lot of barren flowers and the yield is always lower. Therefore, for sowing, take seeds that are 3-4 years old. And even older, because their germination capacity lasts 8-10 years.
Already processed seeds are sold in stores, so it makes no sense to soak them in potassium permanganate or some other preparations. They can be sown immediately dry, or they can be wrapped in a damp cloth and placed in a warm place. As soon as they bite, you can sow.
To increase the resistance of cucumbers to cold weather, the seeds can be hardened before sowing. In this case, the seeds are also wrapped in a damp cloth and sent to the refrigerator for 2 days. But here it is important that the tissue is wet all the time, and the seeds are not germinated. After hardening, the seeds are immediately embedded in the soil.
Cucumber seeds are sown to a depth of 1–2 cm in peat pots or plastic cups. And in no case in boxes, because when transplanting, the seedlings take longer and badly take root.
Before germination, the pots are kept at a temperature of 28 - 30 ° C. But as soon as the first sprouts appear, the seedlings are removed to a cooler place with a temperature of 18 - 20 ° C. Otherwise, the seedlings will stretch out.
The place for seedlings should be very bright, ideally a south or east window. On the western and northern windowsill of the cucumber, illumination with phytolamps will be required - 12 hours a day.
Top dressing of cucumber seedlings is not required - for a month before planting on the beds, young plants have enough nutrients that are in the soil.
Before planting seedlings in the ground, it is useful to harden it - for about a week you need to take it out into the open air. Water the day before disembarkation.