Living Wall??

My aunt in Tumwater, Washington recently sent me an article from the Olympian about a living wall display that Patrick Blanc designed in Tacoma, Washington. I've seen living wall displays. One of the greenhouses in the Green Bay area makes small living wall displays using old, large picture frames and sedums. Which made me think that maybe living walls could be incorporated into the school atrium? This summer I remember reading an article about a urban area that was using recycled materials to create living walls, now I wish I could find that article again. I wonder how hardy the living wall would be here in Wisconsin? If anyone has any experience with living walls, I would love to hear from you!