In Paris, small gardens flourish in numerous streets. One of the most original projects might be the micro-hop garden on the roof of the Opéra Bastille which will supply 500 kg of fresh hop to a micro-brewery installed in the attics of the opera house. Around 100 plants have already been planted, 200 more will follow shortly. The start-up Topager, that runs the project, also plans a vegetable farm on the same roof.