When I left Ohio, it was 7 degrees with snow on the ground; this Napa kitchen garden is a warm respite. Here at the American Center for Wine, Food and the Arts, a number of cool season vegetables are growing…. radicchio, fava beans, broccoli, lettuces and beets. Meyer lemons are ready for picking. The other fruit trees are bare and reveal their structure. The gardens were designed by the landscape architecture office of Peter Walker and Partners. It is America’s answer to Villandry; and in true American fashion it has a highway that runs through the middle of the gardens.