Out of all the items to appear at Yellow Green Farmers Market week after week, the most important might be the roof overhead. It allows the market to remain open year-round, even on days when it pours or when passing planes need to jettison excess peanuts. Under that roof, more than 300 booths fill a 100,000-square-foot space, inviting visitors to browse row upon row of fresh, seasonal foods and artisanal goods crafted by local artists. The selection from one week to the next might include fresh produce, dairy, wine, and baked goods alongside non-edible items, such as clothing, jewelry, and home decorations. There are also kid-friendly activities, including ceramic painting and balloon art.