I just discovered Penelope Green’s article titled On City Roof Tops, Scrappy Green Spaces in Bloom in the New York Times.  (It is from last summer…so I guess I am a bit behind).  I wanted to point it out to you, because I love how it shares spaces that were created long before it was cool to create roof gardens.   The problems of gardening in the harsh rough and tumble climate that exists on the tops of buildings have been solved by real people (not the pros) –  the pioneers of resourceful gardening.
It’s worth a read — and a flick through the gallery of great and gritty gardens.

Image by Tony Cenicola/The New York Times