The grapes we choose for our 26 Buehler Vineyards Napa Valley Zinfandel are a mix of those off our estate vineyards and grapes from other select Napa Valley high quality, low-yielding vineyards. Dry-farmed for over a decade, our 4.5 acre estate block consists of mature thirty-six year old vines which typically give us around 3. tons/acre of beautiful hillside zinfandel fruit. Interspersed among the head-trained vines are a handful of Petite Sirah vines representing perhaps 5% of the total vines in this block. A traditional field companion to Zinfandel in pre-prohibition California vineyards, Petite Sirah contributes pepper, color, and tannin structure to the wine.