Tropical Greenhouse
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Inside the tropical Biome at Eden Project: The covered biomes are constructed from a tubular steel (hex-tri-hex) with mostly hexagonal external cladding panels made from the thermoplastic ETFE. Glass was avoided due to its weight and potential dangers. The cladding panels themselves are created from several layers of thin UV-transparent ETFE film, which are sealed around their perimeter and inflated to create a large cushion. The resulting cushion acts as a thermal blanket to the structure.

Tropical Greenhouse at Kew Garden.
It is entirely possible (but often not profitable) to grow tropical plants in a cold climate using a greenhouse. The high temperatures necessary will require good insulation and some heating. Keep in mind that the tropical atmosphere implies a high moisture environment, and that wood may therefore not be a good building material for the greenhouse. The high moisture has other implications, such as potentially for hygiene and insect infestations.
What to grow
tropical fruit trees (citrus), mangos, bananas, avocados?
Related Pages
Links
- Hamilton Spectator: “Gardens under glass offer bright respite from winter”