Winter Greenhouse Farming

Rick Steffen could be thought of as a small farmer for all seasons. That's because he grows a variety of crops, some unusual like his fruit orchards—inside a series of 55 greenhouses, some up to a half-acre in size, near Portland, Oregon. As a result, he has been able to extend the growing season, and bring earlier to the local Portland Farmers Market food (like cherries) that traditionally are still out of season here.
From Food Farmer Earth http://www.youtube.com/user/foodfarmerearth?feature=watch