Greenhouses

The greenhouses can be very different - from the simplest ones in the form of a wooden or metal frame covered with polyethylene film, to stationary ones, manufactured specially by the factory method and being rather special constructions than simply constructions equipped with special equipment for heating, ventilation, additional irradiation and evenautomatic irrigation, so the plants in them can be grown almost all year round. The latter variety of greenhouses is used more often in large household plots, an amateur, especially a beginner, is unlikely to have to deal with them.

For the duration of operation, the greenhouses are divided into winter and spring. As a rule, the winter ones are more thorough and have a permanent place, the spring can be "one-off"( a film on a wooden frame) or portable, collapsible.

By the form of translucent fencing, greenhouses can be film( with which they often have to deal with an amateur), glazed and coated with hard polymeric materials. With the latter, as a rule, professionals deal. The maximum "greenhouse" or "greenhouse" effect is provided by glazed greenhouses.

Very well, if the greenhouse is equipped with curtains or opening windows, this will facilitate the hardening of plants. However, in all cases it is important that the greenhouses are airtight and the plants do not suffer from drafts, which is especially often the case in glazed greenhouses. To do this, special methods are used to seal the glazing

. To build greenhouses( especially large winter ones) is better in sheltered places in well-lit areas with a minimal slope. It is very important that in spring, instead of protecting from the cold, superfluous overheating of the greenhouse does not result from a decrease in the overall light transmission( "Too good - too bad!").Here the optimum is achieved by the correct orientation of the greenhouse in relation to the sun and the shape of the structure - it is easier to achieve the desired light and heat regimes in greenhouses with inclined side walls or unequal roof slopes( 60-70 ° C to the southern slope and 30 ° C to the north).

As a greenhouse can be used and a common veranda facing the windows to the south or south-east.