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PolytunnelA polytunnel is a structure made of polyethylene, a family of waxy thermoplastics that serve as a tunnel for growing plants in a controlled environment. These structures are built for the survival of plants and vegetables that need a higher temperature and humidity than that present naturally in the environment. The polytunnel operates on a similar principle as that of row covers and greenhouses. These structures are mostly found in the temperate regions of the globe. Potatoes, onions, melons, lettuces and cucumbers are commonly grown in polytunnels across the UK. Polytunnels are often constructed from solid materials which make them strong and sturdy for extensive use. These structures are mainly situated outdoors, and so they need to withstand the harsh external environmental conditions. Polytunnels are often built on foundation tubes laid into the ground. The main frame of these structure is then fixed with support bars and stabilisers. These structures are made in different shapes, sizes and styles. In case there is any damage to the polyethylene material, care should be taken to ensure its smooth replacement. Homemade polytunnels generally feature unique styling and simple construction. Garden polytunnels often provide a cooler environment for plants and shrubs. Polytunnel gardening has become a popular activity in several European countries. |
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