Green screens are a subcategory of vegetated wall surfaces such as a ‘green wall’ or ‘vertical garden’.  Green screens are a system of climbing plants or other vegetation that attach to a specifically designed supporting structure of anchored wires. These supporting structures typically act as an open-air trellis that can be affixed to a building wall or built as a freestanding structure. The roots of the covering vegetation can begin at the base of the structures, in the ground, or in planters on the roof, and fill in over time.

Fig. 2. Hardscape Planting Receptacle section drawing (Source. Downtown 2015)