A greenhouse provides a means of changing the environment around plants to improve their growth. Some greenhouses are also an integral part of a house and yard design. Greenhouses chosen for their appearance are often more expensive than simple plant-growing structures. This UW Extension bulletin discusses general considerations in selecting a greenhouse, and offers information on covers, heating, ventilation, cooling, controls, and accessory equipment. A variety of helpful photos are included along with a chart suggesting appropriate temperatures for growing common vegetables and flowers.