Shopping at Farmers' Markets is becoming the "In" thing to do. Stopping by a road side stand to pick up fresh berries while on a road trip adds to the flavor of travel. Going out to the pumpkin patch to pick out the perfect pumpkin is all part of the fall experience. What may not be as obvious is the money we save by participating. Eating food that is in season and at its freshest helps the local economy by supporting farmers; it saves fuel because fruits and vegetables don't have to be flown in from other countries; and it limits the amount of chemicals that have to be used to force fruits and vegetables to ripen.
Not sure when fruits and vegetables are in season? Check out the Center for Urban Educations Sustainable Agriculture site where they have a chart for Fruits and Vegetables.
While you're at it, consider picking up extra and saving it for later. Most Fruits and Vegetables can be frozen or canned for later use. My family also makes a batch of apple sauce and jam to store for the year. I can't tell you the last time we purchased either item at a store.