Just about everyone I know is making an effort to eat more locally-grown foods. (In case you hadn't heard, it's not good enough to trust Whole Foods to these sorts of things. They don't always do such a good job. You really must search out those products that are in season in your area and -- hopefully -- buy directly from a farmer.)
This tool here makes it easy to figure out what is in season in your area. It even tells you what neighboring areas are growing if you're willing to step out of your immediate region to satisfy a craving. For instance, radishes and limes aren't in season right now in Southern California, so if I do decide to buy them (I almost always like to have both on hand) I can seek out those grown in Northern California, where they are in season.
I feel a bit guilty, though, because there is so, so, so very much grown in California at any time, which is definitely not the case, say, in New York. In other words, if you live in California you simply have no excuse to be eating Chilean peaches at this time of the year. Wait, anytime of the year!