Why do they open doors in the greenhouse in winter: what does it threaten

How to properly manage a greenhouse in winter? Many people ask: "Do I need to open the doors and window in the greenhouse in winter?" Why do some summer residents and gardeners keep their greenhouses open?

The answer is simple - so that the ground is well frozen and all the pests in it. However, is it necessary to open doors and vents for this? Due to the lack of snow, the ground freezes over a meter. And when there is frost at 30-40 degrees, the ground freezes by 1.5 or even 2 meters. On an uncovered area, the ground is covered with snow, so it freezes less. Snow, as it were, protects the earth from frost, keeps it warm.

Now someone thought so. With a frost of minus 20 degrees, the greenhouse will have a lower temperature (-10). But this statement is true only under 2 conditions. The day should be sunny and there should be no snow on the greenhouse. Weak sunlight passes through the snow-free polycarbonate and heats the air in the greenhouse. But the air is heated, not the soil.

Therefore, if the ground in the greenhouse is not covered with snow, then it freezes deeply. With a closed greenhouse, the soil freezes more than in an open one. An open greenhouse door will not help with pest control. For example, when it gets colder in the ground, a bronzovka simply falls asleep and does not think to freeze.

Many people open a greenhouse in winter for one reason: the wind blows snow from cold polycarbonate. The snow does not stick and does not stay in the greenhouse. But no one is immune from the first wet snow. By the way, wet snow will slide off warm polycarbonate faster and easier. Therefore, it makes no sense to open a greenhouse.

But manufacturers recommend keeping the greenhouse open in winter so that condensation does not appear from the temperature difference.

The frame is very sensitive to high humidity. Mold and green algae appear on polycarbonate. As a result, the material poorly transmits sunlight.

When open doors in the greenhouse such a green plaque does not form, and it is not necessary to wash it off in the spring. By the way, one open window is enough, you should not open all the doors. This is also true for those who are afraid that cats will visit the greenhouse. If there are strong winds in your area, then in winter it is better to ventilate the greenhouse periodically, do not leave open all the time.