Turley Wine Cellars was founded in 1993 by Larry Turley after he sold his half of the Frog's Leap Winery and set out on his own. Seeking out old vineyards, Turley now produces 28 separate wines from 35 different vineyards - some of which date back to the late 1800s and are among the oldest surviving vineyards in California. These old vines require special attention and very careful farming as their yields are dramatically decreased by age, but once restored, the fruit they can yield is without equal. Focused principally on Zinfandels and Petite Sirahs - mostly vineyard designates - Turley seeks to both "create and preserve California's unique winemaking culture." All of Turley Wine Cellars' vineyards are either certified organic or are in the process of receiving certification and only natural yeasts are used in the fermentations.