Roof garden
A roof garden is a garden on the roof of a building. Besides the decorative benefit, roof plantings may provide food, temperature control, hydrological benefits, architectural enhancement, habitats or corridors for wildlife, recreational opportunities, and in large scale it may even have ecological benefits. The practice of cultivating food on the rooftop of buildings is sometimes referred to as rooftop farming. Rooftop farming is usually done using green roof, hydroponics, aeroponics or air-dynaponics systems or container gardens. Humans have grown plants atop structures since the ziggurats of ancient Mesopotamia (4th millennium BC–600 BC) had plantings of trees and shrubs on aboveground terraces. An example in Roman times was the Villa of the Mysteries in Pompeii, which had an elevated terrace where plants were grown. A roof garden has also been discovered around an audience hall in Roman-Byzantine Caesarea. The medieval Egyptian city of Fustat had a number of high-rise buildings that Nasir Khusraw in the early 11th century described as rising up to 14 stories, with roof gardens on the top story complete with ox-drawn water wheels for irrigating them. Among the Seven Wonders of the Ancient World, The Hanging Gardens of Babylon are often depicted as tall structures holding vegetation; even immense trees. In New York City between 1880 and Prohibition large rooftop gardens built included the Hotel Astor (New York City), the American Theater on Eighth Avenue, the garden atop Stanford White's 1890 Madison Square Garden, and the Paradise Roof Garden opened by Oscar Hammerstein I in 1900. Commercial greenhouses on rooftops have existed at least since 1969, when Terrestris rooftop nursery opened on 60th st. in New York City. In the 2010s, large commercial hydroponic rooftop farms were started by Gotham Greens, Lufa Farms, and others. Roof gardens are most often found in urban environments. Plants have the ability to reduce the overall heat absorption of the building which then reduces energy consumption for cooling.
