Three Single-Vineyard 2011 Zinfandels from Ravenswood

When Constellation purchased Ravenswood for $148 million in 2001, the consensus was: "Uh-oh." No way, we thought, will the giant

alcoholic beverage company allow Joel Peterson to make those single-vineyard old vine zinfandels with the same individuality, if at all. These fears proved groundless, as a decade shows. Peterson founded the winery in 1976, and…