Answer: If you want to grow these crops in the ground during the spring and summer, a plastic film covered hoophouse, with ventilation fans, is a good choice. If you want to keep things blooming and fruiting through the winter, you'll need a double-glazed structure, supplemental light, and heat, which can be expensive where winter temps are cold and daylight short.
If you are doing research for a commercial venture, contact your provincial government offices for planning help. They can also help you locate wholesale distributors of agricultural products. If this is for your home gardening pleasure, you can check out these internet sites for information:
The Gardener's Source List:
Scott's Indiana Greenhouse
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