When cucumbers grow poorly in a greenhouse, what to do must be decided quickly. The choice of one or another way to eliminate the problem depends on the cause of this phenomenon. Cucumbers are a capricious crop, so some agro-technical mistakes lead to a minimal and low-quality harvest. This fact upsets the owners of summer cottages. Some may refuse to continue growing cucumbers in the greenhouse, more stubborn gardeners will find the reason and try to eliminate it.
Causes of poor growth of cucumbers
There are several factors that negatively affect the future harvest. The main reasons for the decrease in the yield of cucumber plants:
The fertility of the soil is constantly decreasing over time, so it is necessary to regularly add special additives to the soil. It is advisable to change the soil in the greenhouse every 2-3 years. To do this, remove the top layer (about 25 cm), and instead fill in fresh earth mixed with humus, peat and sand.
It is important to periodically feed the plants, especially when planting in infertile or marginal soil. You can add the first addition when sowing seeds or planting seedlings. To do this, a little humus is mixed into the prepared holes.
As soon as the seedlings take root, it is recommended to spill them with a solution of liquid mullein, taken at the rate of 1 liter per bucket of water.
To increase fertility, it is necessary to use complex mineral fertilizers.
Infection with fungal diseases is another reason for the poor growth of bushes. First, the fungus infects the soil, and then the plants themselves. As a result of exposure to infection, the death of the entire culture is possible.
To prevent infection, it is necessary to pre-disinfect the soil substrate. To do this, spill it with a saturated solution of potassium permanganate, it is better to do this before planting cucumbers.
When growing cucumbers in a greenhouse, it is important to understand that insect pollination indoors is difficult. Therefore, self-pollinating varieties are usually taken, on a bag with this type of cucumber is marked F1. Such seed material is of higher quality, but it must be sorted first, removing the infertile seed. The germination test is carried out in a 5% saline solution; seeds that have settled to the bottom are taken for planting. Before sowing, they will have to be soaked in appropriate formulations and treated with growth stimulants.
How to identify and eliminate the causes
To prevent damage to the roots, it is better to sow seeds immediately on a prepared bed. It is convenient to grow seedlings in organic containers, which are then planted with the plant. You can also use individual dishes, from which the sprouts will be removed along with a lump of earth.
With thickened plantings, the plants have competition for nutrients, water and light. There is a high probability of oppression of weaker plants. Poor ventilation and lack of light also lead to loss of yield. To prevent this from happening, it is necessary to maintain a distance between the bushes in a row of at least 20 cm, and between rows - from 60 cm.
When growing cucumbers in a greenhouse, it is important to control the temperature. The optimal indicators are at + 25 ° C during the day, at night - not lower than + 15 ° C. Temperatures below + 15 ° C adversely affect ovary formation and plant growth. Those who are wondering why crocheted cucumbers in a greenhouse need to pay attention to this fact. Exceeding the norm of + 30 ° C interferes with normal fertilization, the yield becomes smaller.
In hot weather during the day, it is necessary to shade the sprouts from the scorching rays.
On cold nights, you will need to create additional heating of the plants. For this purpose, plastic containers, buckets and barrels filled with hot water are used. You can pour warm water on the ground in the evening.
Cucumbers are a light-loving culture, therefore it is necessary to provide them with optimal illumination. If there is not enough light, then it is necessary to use artificial lighting. It is important to water the plants abundantly at intervals of 2-3 days with warm liquid, and the water temperature should be approximately the same as the temperature of the soil. At the same time, excessive moisture should be avoided, as this can lead to the formation of rot on the roots, diseases and subsequent death of plants. Varieties with wide leaves, which evaporate a large amount of moisture, are especially in need of water. Lack of water negatively affects the taste characteristics of the fruit.
If a large number of ovaries and shoots are formed on a bush, you need to take care of timely molding. Tearing off excess shoots is optional in single-stem varieties and hybrids with limited lateral shoot growth.
Excess nitrogen compounds and pest infestation
With an excess of nitrogen, all the forces of the plant go to the formation of green mass. The leaves become large and bright green, but a lot of barren flowers are formed on the plant. An excess of nitrogen leads to a lack of phosphorus and potassium, which are responsible for the quantity and quality of the crop.
If symptoms of excess are found, it is worth feeding the plant with a potassium-phosphorus supplement, ash. To prevent overdose, it is necessary to monitor the amount of nitrogen fertilizers applied.
For pest control, insecticides or folk methods are usually used - soap solution, infusion of garlic arrows or onion peels. In order not to wonder why cucumbers grow poorly in a greenhouse, it is necessary to follow all agrotechnical rules for growing this crop. In the case of planting seedlings, it is important not to delay this process. Monthly sprouts are most often planted in the ground, in this case their adaptation will be the best. It is important not to damage the root system. When growing cucumbers in a greenhouse with seeds, do not forget about warming up the soil, otherwise the seed material may rot. Sowing is best in warm weather.
If the fruits grow poorly in cucumbers in the greenhouse, and the plants themselves begin to lag behind in growth, it is important to correctly identify the cause and take appropriate measures. Timely harvesting will also help to improve the development and growth of fruits. If ripe fruits are not removed in time, the ovaries may die.