It is a fabulous (non-structural) small-garden option for an apartment's roof deck or small yard, using recycled/scrap gutters, of course.
Once I've moved into in my next Green Apartment (with a roof deck!), I will post some photos of my own. In the meantime, here is a photo from Apartment Therapy:

Thank you t0 Greenmoms for Tweeting this link to the enviromom blog!