A little bar I love in Williamsburg, Oulu, on N. 4th street... The facade is an extensive greenwall! I'll be by next year to take some shots of how it takes winter.
Dwell did an article on it after it was installed & they have the facts:
The succulents are planted in 35 or so panels of soil, each less than three inches thick, which are screwed to the wall. A hidden watering system gives them a steady spritz. A living wall can easily be planted on a residential façade, Marni says, at a cost of about $50 a square foot. Interior walls are roughly $30 more per square foot because they contain tropical plants, which are more expensive.