CSA stands for Community Supported Agriculture. Essentially you pay the farm in the beginning of the growing season for a certain share or percentage of the harvest, of whatever is seasonally ripe, usually delivered every week/bi-weekly, and usually in a vegetable box format so you'll get a little of everything that's currently in season. It's good for you in that you get a shitload of incredibly fresh produce (this model completely bypasses the grocery store and their supply chains which increase time-to-shelf), and it's good for the farmer in that in spreads the risk around, you're buying a percentage and not a fixed amount, so if there's a drought and they have a drop in yield, you're still getting the same percentage of the harvest yield but it's going to be smaller for everyone due to the drought. If you have the means to store all the produce, I'd highly recommend joining one. OMC in Columbus does this as well for meat, but I'm not sure what their program entails since it's closed for the year.