Not sure if you have seen this, but there recently have been reports circulated about green walls failing around Australia and also around the world.  Please see this link:  Failing London Green Wall  for an article about a recent green wall failure in London.

How the wall got to this stage is beyond me.  In order for larger scale walls to be successful into the future they need to be maintained on a regular basis. Imagine what your garden would look like if it was neglected for 3 years?  The maintenance of a green wall needs to be conducted by qualified and experienced professionals who are able to identify potential problems before they get out of control.  The failure that you see in the article could be the result of a number of factors including over or under watering, over fertilising, poor plant choices, pump failure, pests, moulds and fungi or bad design.  A regular maintenance regime should be able to identify these problems before it is too late.

I have observed similar occurrences here in Australia which is unfortunate as Green Walls with the right care can truly be a magnificent addition to any indoor or outdoor space. I believe it is the responsibility of professionals like myself to advise and guide people on how to obtain a long-lasting and vibrant Green Wall. Maintenance is a key part of this technology and without it is doomed from the word go.

If you are looking to install a green wall then please don't be put off by the failures that are occurring.  These are the result of poor planning, poor design, poor installation and poor maintenance.  Make sure that you subscribe to an ongoing maintenance program to protect your investment into the future.  It is a small price to pay to keep your wall looking healthy into the future. 

Happy vertical gardening and maintaining,
Jock