SONOITA — Todd and Kelly Bostock are busy at work among empty boxes and wood barrels of wine. The two owners of Dos Cabezas WineWorks are bottling caseloads of wine in a small warehouse off Highway...

Southern Arizona’s climate seems like an unlikely choice for a winery. But in the Sonoita area, soil has tested nearly equal in quality to the soil in Burgundy, France — wine capital of the world....