Roof garden

[3] Rooftop farming is usually done using green roof, hydroponics, aeroponics or air-dynaponics systems or container gardens.

[6] 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.

[7] Among the Seven Wonders of the Ancient World, The Hanging Gardens of Babylon are often depicted as tall structures holding vegetation; even immense trees.

“As cities grow, permeable substrates are replaced by impervious structures such as buildings and paved roads.

Storm water run-off and combined sewage overflow events are now major problems for many cities in North America.

An urban garden can supplement the diets of the community it feeds with fresh produce and provide a tangible tie to food production.”[13] At Trent University, there is currently a working rooftop garden which provides food to the student café and local citizens.

Hydroponics and other alternative methods can expand the possibilities of roof top gardening by reducing, for example, the need for soil or its tremendous weight.

"Roof gardens present possibilities for carrying the notions of nature and open space further in tall building development.

Recreational reasons, such as leisure and relaxation, beautifying the environment, and greenery and nature, received the most votes.

It may include planters, plants, dining and lounging furniture, outdoor structures such as pergolas and sheds, and automated irrigation and lighting systems.

[17] The planters on a roof garden may be designed for a variety of functions and vary greatly in depth to satisfy aesthetic and recreational purposes.

These planters can hold a range of ornamental plants: anything from trees, shrubs, vines, or an assortment of flowers.