Idea for a Friends Rooftop Patio in San Francisco

I'm posting this for a friend in San Francisco (you know who you are) who has a bit of a challenge with creating a rooftop garden.  There is no water source up on the top of her home and there are challenging circular stairs to get there.  Here is a solution - imitation boxwood hedges.  I think they look fabulous - especially when you have the texture of the table and chairs - along with the great striped fabric.  

{photo: domino via flickr}