In the United States there are of plantings mostly in California, where Barbera is one of the most successful of the Piemontese grapes to be adopted in the state. It is widely planted in the Central Valley, where it is a blend component in mass-produced jug wines. In recent years, the fashion of Italian grapes has caused more California winemakers to look into producing high quality varietal Barbera. Plantings in the cooler regions of Napa and Sonoma have produced some successful examples. In Washington State, producers have been experimenting with plantings of Barbera in the Red Mountain, Walla Walla, and Columbia Valley AVAs. So far these very young vines have produced fruity wines with strawberry notes and limited complexity and aging potential. In addition to Washington, in the Umpqua AVA of Oregon plantings of Barbara are proving successful, as well as plantings in central and southern Arizona.