Enclosed Mini-gardens outside of windows?
I have noticed these gardens mainly at dentist offices. Each room in the building has a window with a view of a separate mini-garden.
Usually a fence or screen is put up ten-to fifteen feet from the building, creating a small courtyard-like space outside of each window. In each of these spaces, is a small, simple garden.
It's a nice sort of garden for a dentist office, but I was wondering if any of you have ever seen these sorts of gardens around regular houses?
Where does this gardening tradition come from? (It reminds me of photographs I've seen of Chinese gardens). Or did someone invent it especially for dentist offices?