What temperature should be in the greenhouse for cucumbers and tomatoes?
Many people like to eat vegetables in the winter, and experienced gardeners, so as not to go grocery shopping, prefer to grow their own vegetables in winter greenhouses. One of the most sought-after products is cucumbers, which, thanks to the development of gardening technologies, can be grown even in harsh and cold winters. To do this, you need to properly equip the greenhouse, equip it with all the necessary materials at hand, carefully monitor the growth of cucumbers and give them proper care.
General rules
Many vegetables, especially cucumbers, are heat-loving plants, which, moreover, love abundant moisture. That is why you need to carefully prepare the winter greenhouse before planting this crop. The slightest change in temperature towards lower rates will inevitably affect the volume of the crop and its quality.
A greenhouse, which implies the winter cultivation of vegetables, must be heated in a certain way; to do this, it must be warmed and equipped with a heat supply system.
Better yields can only be achieved if certain requirements are met.
- Proper construction of the greenhouse. Experienced gardeners advise not to use the film during the construction of a winter greenhouse, because it is not strong enough: during snowfall snow will accumulate on it, which by its weight can not only tear the film in a separate place, but also destroy the structure. For construction it is better to use materials such as glass or polycarbonate.
- Adjustable humidity.
- High level of insolation and artificial lighting.
- Loose, slightly loose soil.
- The presence in the greenhouse complex heating system and the soil and air.
The optimum temperature is at least 18 degrees, but it should not exceed 40, otherwise a drought occurs in the room, which will harm the fruits.
Correct temperature
Vegetables such as cucumbers and tomatoes are quite fastidious, and they require special cultivation conditions. That is why perfect conditions should be created in a greenhouse for cucumbers and tomatoes: not too dry air, special temperature conditions. It is better not to resort to the use of convectors, metal heaters and stoves, as well as oil heaters.
The most appropriate option would be to use a water heating system. It involves the heating of the soil through the pipes laid in the soil and beds. This system will also heat the air with the help of special radiators that need to be placed around the perimeter of the winter greenhouse.
Next, we describe the temperature that is optimal for tomatoes and cucumbers at different stages of their cultivation. We also note that these vegetables can be planted together, in the same greenhouse, since the cultivation methods are quite similar.
When landing
Before planting crops in a polycarbonate greenhouse, you need to prepare a few beds in advance and build a supply and exhaust ventilation system. This is important because excessive heat and dry air will not contribute to the growth of seedlings. Therefore, it is better to stick to an average temperature of 18-21 degrees. However, during the cultivation of tomatoes it is necessary to frequently ventilate the premises, since this crop prefers fresh air and ventilated premises.
Based on this, it is better to place beds with tomatoes near the doors and windows.
It is impossible to monitor the temperature regime, if there is no thermometer in the greenhouse. If it is difficult to monitor and control the temperature in the greenhouse, you need to install special transoms on the automatic control. When the room temperature rises, the ventilation windows will open wider and wider to help ventilate the greenhouse.
During the flowering period
Cultures such as tomatoes and cucumbers, although they have a similar way of cultivation, are nevertheless excellent in their care. For example, during the cultivation period, tomatoes prefer a temperature regime that ranges from 21 to 26 degrees. Since polycarbonate greenhouses heat up very quickly, the temperature in them grows as rapidly, so you need to carefully monitor the thermometer bar.
If you allow the temperature to rise to 30 degrees and above, then this will adversely affect the health of the fruit.
Regarding cucumbers, we note that they grow best and bloom in temperatures above 25 degrees. However, it must be said that it is impossible to produce a sharp rise in temperature, since this can be just as destructive for plants as cold. For this reason, many experienced farmers are gradually raising the degree of heating in the greenhouse. They do this in stages 3-4, to ensure that plants get accustomed to new temperature conditions.
If there is a question about growing cucumbers and tomatoes in one greenhouse, then it is necessary to choose a temperature that will be optimal for that and for another kind of crops. In particular, experts advise to keep the thermometer at 25. The best night temperature is 19-20 degrees. It is precisely with such temperature characteristics that the optimum humidity will be established - about 68-72%.
Despite the fact that cucumbers feel comfortable in high humidity, it is impossible to bring it to extremely high rates, because this situation threatens with the appearance of the greenhouse effect, which will cause the appearance of many diseases in the fruits of this culture. For example, fruits can rot, growth slows down significantly, the ovaries become fragile, fragile and disintegrate, and the fruits themselves turn out to be unpleasant to taste.
In order to reduce the amount of water used during irrigation, experienced gardeners advise to mulch the soil with straw or peat, sometimes rotten sawdust is suitable for this role.
During fruiting
The temperature conditions for the care of crops during their fruiting do not change significantly - they are also 25-26 degrees. At this stage, it is important to remember that the soil for cucumbers should be sufficiently wet - for this professional farmers use a drip irrigation system. It allows you to water the vegetables separated with warm water that moisturizes the soil for about ten centimeters.
After the harvest begins to appear, it is necessary to produce a constant harvest of fruits.
Tomatoes and cucumbers will most likely be harvested every day, since an uncollected crop can badly affect the formation of a new one. For example, a cucumber left in the garden considerably slows down the formation of a new cucumber and the setting of the next fruit.
Usually, the harvest is carried out in the morning or in the evening, it is best to do this process after watering vegetables. At the same time, it is necessary to make temperature control: make sure that there are no abrupt changes in the mode of heating the greenhouse, as well as to adjust the temperature to the correct level in case of weather changes.
If you follow these simple recommendations, you can enjoy the year-round harvest of cucumbers and tomatoes, which will always appeal to lovers of salads and homemade preparations. In order to increase the period of active fruiting, it is recommended to plant cucumbers and tomatoes in batches, in several stages - this will allow you to update the plantings and get a harvest all year round, even during the cold winter months.
However, it is important to control the temperature conditions in the greenhouse in order to ensure good growth of the grown crops. As we noted above, for each stage there are different temperature indexes.
When do plants freeze?
Critically low rates on the thermometer are very dangerous for the growth and livelihoods of thermophilic plants: they simply cannot withstand the cold weather.
The minimum allowable temperature of the soil when planting plants should not fall below 5-7 degrees, otherwise the crop dies.The growth of culture stops at 10 degrees, it is almost impossible to restore it. The ovary cannot form at 17–20 degrees, as well as above 33–35, therefore not only low temperatures are dangerous, but high temperatures as well. However, frozen plants in cold climates are a far more frequent problem for gardeners in our latitudes.
In order to avoid it, it is necessary to carefully equip the greenhouse and closely monitor the weather, creating the most favorable conditions for plants to grow and develop.
For tips on the right temperature in a greenhouse, see below.