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John Preece, a horticulturalist and professor in SIUC’s Plant, Soil, and Agricultural Systems department, demonstrates how to winterize vegetables such as broccoli and cabbage by using a high tunnel – a 12 ft. x 24 foot green house structure made of steel rafters and a layer of polyethylene. If you can’t afford a high tunnel to protect your crops from the winter cold, Preece suggests a polyester row cover, which can be purchased at any hardware store. Snow caught on top of the cover acts as an insulator. Preece adds that his lettuce plants do better under the row cover than in the high tunnel.

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