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Sustainability 2016, 8(11), 1108; doi:10.3390/su8111108

Global Trends and Current Status of Commercial Urban Rooftop Farming

Synergy Village, Oberschirmensee 16, 8714 Feldbach, Switzerland
Institute of Natural Resource Sciences, ZHAW Zurich University of Applied Sciences, 8820 Waedenswil, Switzerland
Author to whom correspondence should be addressed.
Academic Editor: Douglas H. Constance
Received: 19 July 2016 / Revised: 3 October 2016 / Accepted: 25 October 2016 / Published: 29 October 2016
(This article belongs to the Section Sustainable Agriculture, Food and Wildlife)
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The aim of this study was to analyze current practices in commercial urban rooftop farming (URF). In recent years, URF has been experiencing increasing popularity. It is a practice that is well-suited to enhancing food security in cities and reducing the environmental impact that results from long transportation distances that are common in conventional agriculture. To date, most URF initiatives have been motivated by social and educational factors rather than the aim of creating large sustainable food production systems in cities. The commercial operation of urban rooftop farms, should they become profitable, is likely to attract notable private investment, allowing a significant level of high quality urban food production to be achieved. There is a reasonable amount of literature available on urban farming that deals with its potential, and its limitations. However, it does not focus on commercial operations. In contrast to other surveys and theoretical papers, this study of URF focuses on large and commercial operations. The analysis showed that commercial URFs can be grouped into two main types: Firstly, hydroponic systems in greenhouses where mostly leafy greens, tomatoes, and herbs are grown; secondly, soil-based open-air farms that grow a large variety of vegetables. Hydroponics is frequently seen as the key technology for commercial urban food production. While the technology is not in and of itself sustainable, hydroponic farms often make an effort to implement environmentally friendly technologies and methods. However, there is still untapped potential to systemically integrate farms into buildings. The findings of this study identified where future research is needed in order to make URF a widespread sustainable solution. View Full-Text
Keywords: urban rooftop farming; Building-Integrated Agriculture; Building-Integrated Farming; Zero-Acreage Farming; hydroponics; commercialization; trends urban rooftop farming; Building-Integrated Agriculture; Building-Integrated Farming; Zero-Acreage Farming; hydroponics; commercialization; trends

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Buehler, D.; Junge, R. Global Trends and Current Status of Commercial Urban Rooftop Farming. Sustainability 2016, 8, 1108.

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