This is the last chance to enjoy low prices on summer produce such as corn, peaches, plums, nectarines, peppers, mangoes, green beans, lettuce, and tomatoes. September will also see the first fall produce hit grocery stores. Look for cheap prices on apples, berries, beets, cantaloupes, cauliflower, eggplants, grapes, honeydew melon, pears, squash, mushrooms, sweet potatoes, figs, and dark-green leafy vegetables such as spinach.