House and garden

Problems of growing cucumbers in greenhouse conditions


The reasons for a poor harvest in open soil can be safely called a lack of rainfall or, conversely, an increased level of humidity, an invasion of locusts and more. But why do not grow cucumbers in a greenhouse, where it is easy enough to create favorable conditions?

The basic rules of a good harvest

Greenhouse cucumbers are slightly inferior in their taste to vegetables grown on open soil. A variety of varieties of the modern market allows you to grow this vegetable without much difficulty. Unpretentious varieties of cucumbers do not require significant efforts and costs for their cultivation.

To obtain a good yield of greenhouse cucumbers, only seeds of self-pollinating varieties should be used.

Growing seedlings

The first step in growing greenhouse cucumbers is to grow good, healthy seedlings in pots.

One of the basic rules for growing quality seedlings is strict adherence to the temperature regime:

  • in the time interval from sowing seeds to seedlings in the room, it is necessary to observe a temperature of 21-27 degrees Celsius;
  • 5-6 days after seed germination, the temperature should be reduced to 15-17 degrees Celsius;
  • The rest of the time it is worth maintaining the temperature at about 18 degrees Celsius, and cloudy days - 14-17 degrees Celsius;
  • the night temperature of the room with seedlings must be maintained at 12-14 degrees Celsius.

Cucumbers are very difficult to transfer transplant to the ground. In this regard, you need to sow them either immediately in their place, or in a pot with peat soil, which is then planted in the ground along with seedlings.

Planting seedlings in a greenhouse

When the seedlings age reaches one month, you will need to transplant it into the greenhouse.

All operations must be carried out in this order:

  • on the surface of the greenhouse soil, you need to make pits up to 10 cm, fill them with warm water;
  • carefully fill the resulting wells with a seedling, as well as soil from a pot, so that the roots are not damaged;
  • the row distance between the bushes is chosen equal to 35-45 cm, and between the rows - about one meter;
  • based on the fact that the young stem of seedlings is very sensitive to rot, it should not be sprinkled with soil;
  • after planting seedlings on the ground of the greenhouse, they are irrigated with warm water with a temperature of 21-240FROM;
  • From the ground to the very top of the greenhouse, the ropes are tensioned to allow the stems to rise up.

Before sowing seeds, you should soak them for a day - they will be better to germinate. Water for infusion should not be taken from the water supply, but well or rain.

Why greenhouse cucumbers do not pour

Cucumbers react strongly to temperature changes at night, especially when they bear fruit.

For a good pouring of greenhouse cucumbers, you must strictly adhere to a certain temperature regime:

  • normal growth and development of vegetables occurs at a temperature of 12-14 0C to 40-42 0FROM;
  • the optimal average daily temperature should be 22 ± 3 0C: in the afternoon (in sunny weather) - 27 0With, in the afternoon (in cloudy weather) - 21 0C, and at night - 12-15 0FROM;
  • if the temperature is lowered for a long time to 7-11 0C, there is a violation of the vital processes of the plant, lowering to 2-5 0C for 4-5 days can lead to the death of the plant.

At night and during the day below the optimum temperature, stems and leaves grow actively, which adversely affects the fruit pouring: they either do not develop or grow very slowly.

It is worth collecting cucumbers at least once every two days, then the ovaries begin to fill up faster. If overripe vegetables are not removed from the branches, this greatly reduces the level of yield.

What to do if greenhouse cucumbers do not grow

Sometimes situations arise when it seems that everything was done correctly when growing greenhouse cucumbers, but there is no desired result: the bushes grew large, bloomed profusely, but they did not start to bear fruit or grow very small, they quickly turn yellow and fall.

The main reasons for this may be:

  • planting insect pollinated cucumbers;
  • violation of the temperature balance or humidity level;
  • imbalance of soil nutrients as well as minerals;
  • excessive planting density;
  • excess leaves on the bush.

When lowering the column on the thermometer below the mark of 15 degrees Celsius, cucumbers do not develop and stop growing.

The main causes of poor or insufficient fruiting of cucumbers

Cucumbers are quite thermophilic and demanding in relation to watering plants. A sufficient level of humidity is the main component of a good harvest of these vegetables. Temperature 25 0C and above is ideal for growing cucumbers.

Water for irrigation should be warm so as not to damage the delicate root system of the plant. Watering these vegetables should be between 17 and 18 hours, which will allow the soil to ventilate before nightfall.

Use of fertilizers for growing cucumbers

A good loose soil easily passes air, which is also an integral part of the proper development, as well as plant growth. But you should not rely only on those trace elements of the soil that are there by nature. It is worthwhile to add additional mineral fertilizers to the soil throughout the entire period of growth, flowering, and fruiting.

It is best if each week to alternate different types of introduced trace elements. The influence of the formation of the ovaries, their quantity may be the presence of phosphorus and nitrogen.

Excessive amounts of nitrogen stimulate strong leaf and shoot growth.

The first 12-14 days of plant growth, it is especially important to saturate the soil with solutions of nitrogen fertilizers. For this purpose, it is necessary to breed a glass of cow manure once a week in 10 liters of water, and when strong cucumbers bloom, the need for phosphorus increases.

Reasons for the fall of greenhouse cucumber flowers

The process of growing greenhouse cucumbers can face a problematic situation when the ovaries begin to turn yellow and fall off. What could be the cause of this phenomenon, what should be done in this case?

One of the important reasons for this may be the presence of a large vegetative mass. Such bushes need to be slightly cleaned of excess leaves. Only then will the cucumbers receive the right amount of sunlight, necessary for the formation, as well as the development of the ovaries, and will not fall.

Also quite common causes when the ovaries dry up and fall off are:

  • Incorrect temperature, light regimes of cultivation;
  • excess or shortage of soil water;
  • improper mineralization of the soil.

Diseases of cucumbers and options for their elimination

The main problems in the development of cucumbers in a greenhouse are:

  • to increase the number of ovaries is capable of introducing an aqueous solution of fertilizers from bird droppings;
  • if the yield decreases during the collection of cucumbers, then fertilizer from cow manure will help;
  • the presence of pale leaves on the bushes indicate a lack of nitrogen;
  • elimination of root rot can be carried out by pollinating the roots of the plant with a mixture of ash, lime and copper sulphate.

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The yield of greenhouse cucumbers directly depends on the commitment of the grower, as well as on how accurately all the rules of cultivation are met. Accordingly, one should approach this issue responsibly.