From the San Francisco Chronicle:

Perigord truffles: They're called black gold because they're one of the most expensive and luxurious ingredients in the world.

Historically foraged in the Perigord region of France and used in the finest restaurants in the world, the black truffle could soon be Sonoma County's next big crop.

Farmers and vintners, who believe that Sonoma's terroir and climate mirrors Perigord, are buying up land, ripping out vineyards and planting trees inoculated with the fungus, hoping to strike it rich - or at least grow some of the best-tasting truffles in the new world.

Jackson Family Wines, the company that owns Kendall-Jackson and a string of smaller wineries, is so convinced of the success of a domestic truffiere that it's planted 10 acres in Santa Rosa with plans to eventually expand to 60 acres, including property in Santa Barbara.

For more, see: Jackson Family Wines turns to growing truffles