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Greenhouse Growing : Siting a Greenhouse

Strong gales can cause severe damage

Strong gales can cause severe damage

To trap as much heat as possible, a greenhouse should be situated in an open, south-facing position without shading from buildings or trees. The ridge of the roof should point east-west, the broadest part of the glass exposed to the sun. This does have the drawback of heating more on one side, and this can be avoided by running the ridge north south. For warmth, the next best side-on aspect is west because it heats up late in the day, and stays warm longer into the night.

An east-facing side-on site goes cool even before sunset and the morning sun can cause damage to plants by too-quick thawing. A north-facing greenhouse, to be of any use, will need artificial heating – even for the usual range of plants.

Do not site a greenhouse in a hollow where cold air might seep in, nor in a windy position. Do not forget the strong eddies of wind around a house, though the site might seem sheltered.


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