Abstract
Dean and Judy Henry constructed a greenhouse that is heated by a wood furnace on their farm. Their initial purpose was to grow raspberries year round, but they were also interested in trying out other crops to determine which crops produced well and were profitable in their greenhouse. The Henrys grew several crops in winter/spring of 2009 to identify promising crops to grow in their greenhouse. This initial demonstration project identified tomatoes and lettuce as good growers in the greenhouse. The raspberries didn’t perform as hoped, but Dean would like to modify his schedule and expectations and try again. The Henrys found that heating the greenhouse in January proved difficult, and they started growing their winter crops later in the season than originally planned. They decided it would have been advantageous to have installed a backup propane heater in the structure.