If possible, place your Hartley greenhouse where it will receive at least 4 to 6 hours of direct sunlight during the winter months. If possible, the best orientation is usually to position the greenhouse with the ridge or peak running east and west, as this will provide more heat gain from the sun during the winter. And if you require shades for late spring, summer and early fall, you’ll most likely reduce your shade costs for odds are you’ll only need shades on the southern side of the roof.
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Posted in: Buying a Greenhouse