If the store is out of the question and even the farmer's market is getting to be too far away, there is a growing trend of "delawning" and replacing the "useless" grass front lawn with a garden of entirely edible plants. Edible estates is a throwback movement to times in the early 20th century when yards had to be used for gardening and not for recreation. It is also a mission for its founder, Los Angeles architect Fritz Haeg, who has made connections to start several Estates all across the country, in addition to the ones currently operating in Salina, KS and just south of LA in Lakewood, CA.
The conversion process involves ripping out everything in a flat, sunny front yard and replanting it with up to 195 varieties of fruits, vegetables and other edible plants. The yards must be tended by their owners 7 days a week, and since no pesticides are allowed, the maintenance can become a second job. And with that many plants in a limited space, the foliage can become rather aggressive, making it even more of a standout from neighboring homes. Incidentally, neighbors aren't too thrilled when one of these springs up on their block, saying "what happens in the backyard is their business, but this doesn't seem...to be a front yard kind of a deal."
Check out the edible estates website if you're interested in learning more. I think I'll stick to the various markets in my area. I like to garden, but the only point I'm trying to make with it is part of my dinner, not one about eco-polotics.
By the way, the family in LA has a blog about their gardening that is quite interesting.