The Oak Knoll District’s ideal soils, seasons, and conditions allows for farming Zinfandel using old world techniques. The first Zinfandel vines in Napa Valley were planted in what is now called the Oak Knoll District, which lies within the much cooler, breezier southern half of Napa Valley–nearby San Pablo Bay (the northern section of San Francisco Bay). The historic, head-trained vines that we specialize in require intensive vine by vine hand work to ensure a balanced crop and uniformly ripened bunches. Annual soil amendments with cover crops of beans and grasses, and organic compost are used regularly each growing season to promote vine health and grape skin thickness.

In a valley-wide effort to protect the Napa River ecosystem and its native fish populations, Robert Biale Vineyards employs farming practices that are designed to conserve soil and river water levels. We have joined other Napa Valley grape-growers and farmers in completing the new Napa Green Certification and Fish Friendly Farming initiative. We feel strongly that abiding by sustainable practices in both our farming and winemaking is the responsible thing to do and is beneficial to our environment, our community, our employees, our business…and our wines! As Bob Biale puts it, “It took us three years of refining our farming and winery practices to finally achieve our official certifications, but in the end, it was all worth it!”

With 24 unique wines in the repertoire, Robert Biale Vineyards has built and cherished the relationships with growers throughout Napa and Sonoma Counties to help preserve these historic Zinfandel and Petite Sirah vineyards. Each of them have their own story and unique history. We hope you enjoy learning more about them and reference the maps below for their location.