Maintaining any garden can prove challenging at times, but sustainably maintaining the worlds tallest vertical garden presents a whole new set of challenges. Australian landscapers Phillip Johnson Landscaping are charged with the onerous task and they implemented innovative systems to improve water, chemical and energy consumption. The 33 meter high green wall forms part of Sydney's Trio apartments and was build in 2009 by Patrick Blanc. The wall covers 12 stories, is 5 meters wide and includes more than 4,500 native Australian plants which have grown to more 305 times their original size.
To minimise water consumption the wall was fitted with a dripper-irrigation system which is fed by a dedicated on site 36,000 litre storm water collection tank, which allows re-use of water and fertilisers. The system also includes automatic metering and remote access to limit energy and chemical waste.
(image source: trio sydney)