Winemaker Notes
With its deep color, firm tannins and bold flavors, there is nothing petite about Petite Sirah. The variety, originally known as Durif in the Rhône, took on its more popular moniker after being imported to California in the early 1880s. Quintessentially recognized today as a grape of the Golden State, Petite Sirah works well blended with Zinfandel and finds success as a single varietal wine in the state’s warmer districts. Somm Secret—Petite Sirah is not a smaller version of Syrah but it is an offspring of Syrah and the now nearly extinct French Alpine variety called Peloursin.
As one of Napa’s coolest sub-appellations, the area begs for diversity among its vineyards. Merlot and Chardonnay firmly compete with Cabernet Sauvignon for a place here. Some of Napa’s best Zinfandels also come from the Oak Knoll District.
Situated far in Napa’s southern end, Oak Knoll receives a strong cooling influence from both the San Pablo Bay and the Pacific Coast’s evening fog and breezes. Summer days are warm but on average ten degrees cooler than in St. Helena farther north up the valley; summer nights are chilly. A long growing season promotes for leisurely ripening of grape berries, resulting in an impressive balance of sugars, phenols and acidity.
Notable producers include Trefethen, one of the appellation’s oldest wineries, Robert Biale, legendary Zinfandel producer and Lewis Cellars, a family-run, hands-on establishment.