We're a little late noting this, but this is really neat and worth noting:
The curiously-named Brooklyn Grange rooftop farm began supplying extremely local vegetables to some area restaurants in the Spring and starting a market on-site and pop-up stands in Brooklyn and Queens in July. When they were getting established, the original location for the farm was supposed to be in Brooklyn, but things fell through and they ended up leasing rooftop space at a reduced rate right here in the neighborhood on Northern Boulevard. It's about as local as food can get in the city, and they're off to a really great start. Local eatery Vesta has been featuring their produce since the first harvests were coming out of the ground, and the chef at Hell Gate Social told me he was starting to buy from them as well. If you're looking to compliment your share or just pick up something that's not coming down from Norwich Meadows, this is probably your best and closest bet. The public market is on Tuesdays and Thursdays, details at http://brooklyngrangefarm.com.