The Greenhouse, built alongside the Hajjar STEM Center, is a teaching space and laboratory for many groups: DIG and Environmental Science classes, AIRS and Focus students doing research, and the Environmental and Garden Clubs. The space allows students to start seedlings early regardless of the weather outside, often to later be replanted in the Nettie Louise Coit Teaching Garden. The greenhouse also allows for a controlled environment in which experiments on plants may be conducted with minimal environmental error. For instance, a past experiment in the greenhouse concluded that bean plants grown in compost from the school’s Compost Arena grew substantially faster and larger than those grown in commercial compost or gardening soil.