I did use some of them in the project that I finished today, and noticed that there is some (but not much) leaf die back, so I think they're fine for now. In a couple of weeks I'm going to buy pots and move most of them into terra cotta pots, since that way the beds can go back to being veggie beds (which is what they were built for)
Also I'm going to make one more semp green wall (in the same way as this one, but with small changes depending on how this one looks after a couple of weeks)