Lufa Farms in Montreal, Canada, grows vegetables on two sprawling rooftop greenhouses today and is expanding to two more. Photograph: /Lufa Farms Many shoppers like the idea of buying local. After Next-gen urban farms: 10 innovative projects from around Please note: You are currently browsing img small urban garden design garden design ideas for modern that is 600x509px in size. This image is listed in urban garden ideas category. Nextgen urban farms 10 innovative projects from around, 600x509 in 265.44 KB.