St. Francis Winery & Vineyards is in Sonoma County. It was founded in 1971 by Joe Martin who planted 22 acres of Chardonnay and 60 acres of Merlot. Today the estate is part of the Kobrand conglomerate of wine and spirits companies. St. Francis now owns more than 415 acres in several appellations, including Sonoma and the Russian River Valley. St. Francis produces Cabernet Sauvignon, Claret, Merlot, Zinfandel and Chardonnay. The estate is especially well known for its old vines Zinfandel.
This grape is grown in milder climates and produces a medium-to full-bodied wine. It is also known as Shiraz, but should not be confused with Petit Sirah, which was developed by crossing Syrah with Peloursin.