With the advent of fall, most vendors at the Saturday Ferry Plaza Farmers' Market are beginning to wind down for the season. Their stands are getting smaller and smaller as the harvest season comes to an end. But that's just the time that Nakashima Farms bursts onto the scene with their first harvest of sweet potatoes -- a fall crop that starts in mid-October. Nakashima Farms grows and sells only sweet potatoes, so you'll find them at the Market every Saturday only during the sweet potato season, which runs from mid-October through May.