Gardening Under Glass and Lights Author:The American Horticultural Society There are many controlled environments that are inexpensive, cost-effective, and space-efficient. Learn about the different types of greenhouses--traditional, solar, and window--plus other systems, from the coldframe to the indoor light garden. Then take a look into the history of the greenhouse; it all started with a Roman emperor's craving for... more » cucumbers out of season.« less