If you have a green thumb but no place to use it, take note - there's a new website called Sharing Backyards DC, where folks can sign up to share their yard to gardeners, or can sign up to look for a yard to use.
The Post has an article on it, it sounds pretty cool. It appears to be free, and there are a lot of folks in our neighborhood both looking for a yard and hoping to share theirs. The site has a Google map with icons on it for looking and willing to share, plus little blurbs when you click the icon.
Anyone interested in doing either! Take a look at the site.