Every Saturday morning beginning April 7 and every Wednesday afternoon beginning May 9, latte sippers mingle with Boulder and Denver chefs, serious home cooks with chatty socializers, at the Boulder County Farmers' Market, the largest farmers' market in the state. It begins the season with flats of seedlings -- tomato, pepper and eggplant, to be nurtured inside, as well as cabbage, broccoli and cold-resistant herbs ready to be set out in the garden. While you wait for those to grow, you can feast off tender leaves of spinach and baby lettuce, blue cornmeal and dried black beans also sold at the market. Later there will be hothouse tomatoes and, still later, brilliant, warm-fleshed specimens ripened by the sun. Then peaches, apricots, plums and, as summer begins to merge with fall, locally grown corn picked the same morning, huge black-purple eggplants and others white as eggs, several kinds of garlic, and long strings of shallots. And at every market, you can take your pick of herb vinegars, mushrooms, turnips and apples, ostrich eggs, melons, honey, armloads of wildflowers, and delectables cooked up by local vendors.