The Urban Oasis Garden at London Bridge will be defined by a linear pocket park at the Greenwood Theatre on Weston Street. Gardenlink has been appointed to build the garden, which is the latest landscape addition to the Cityscapes urban landscapes project.
King's College London, Network Rail and the London mayor's Pocket Parks Programme have helped to bring greenery to the area.
Cityscapes was launched two years ago by Darryl Moore and Adolfo Harrison of Moore Harrison Land Design as a garden design and art event.
Moore said: "The need for shows such as Cityscapes becomes more paramount every year as the effects of urbanisation become clearer. Landscape and horticulture help make cities great and help to ease pollution, flooding and rising temperatures.
"Cityscapes also keeps green spaces on the political radar. We have been lucky with funding but many local authorities find themselves in no position to help financially. But they can, and do, help in other ways such as lending diggers or materials."
The Rhodes-Swift design will rejuvenate an unused space around the theatre with seating and increased biodiversity. The garden is due to open in October. Moore said Cityscapes is an ongoing initiative rather than tied to specific dates like conventional flower shows.