Gundlach Bundschu Winery

Jacob Gundlach arrived in California during the mid-nineteenth century and in 1858 purchased 400 acres in Sonoma Valley, planting 60,000 vines with rootstock he had sourced directly from Germany and France. The first full vintage followed in 1861, establishing what would become one of California's most enduring wine estates. Charles Bundschu joined the business in 1868 and married Jacob Gundlach's daughter Francisca in 1875, cementing the family partnership that defines the winery to this day. The 1906 earthquake proved devastating, destroying the production facilities and wiping out one million gallons of wine, and Prohibition further suppressed activity for decades. It was fifth-generation Jim Bundschu who in 1969 developed a restoration plan, releasing the first modern vintage in 1973 and setting the stage for a full family revival.

• Jacob Gundlach purchased original 400-acre property in 1858 and planted 60,000 vines with German and French rootstock
• First full vintage produced in 1861, making this one of California's earliest commercial wine operations
• The 1906 earthquake destroyed production facilities and one million gallons of wine
• Fifth-generation Jim Bundschu launched the modern era with a restoration plan in 1969 and first new vintage in 1973

Gundlach Bundschu is today led by sixth-generation Jeff Bundschu, making it California's oldest continuously family-owned winery and a member of the Sonoma County Winegrowers' Century Club. The Bundschu Company has grown beyond wine into a broader portfolio that includes Abbot's Passage Winery and Mercantile, the GUNBUN brand, Towle Wine Company, and the Huichica Music Festival, produced in partnership with music promoter (((folkYEAH))). A significant milestone in family history came when Katie Bundschu became the first female winemaker across six generations of family agriculture. In July 2025, Connor Bockman was appointed winemaker, working alongside consulting winemaker Keith Emerson to continue the estate's winemaking legacy. The business recorded strong commercial momentum in 2024, with wholesale shipment revenue up 17% and the GUNBUN brand growing 62% over the prior twelve months.

• Jeff Bundschu leads the sixth generation; the winery is a member of the Sonoma County Winegrowers' Century Club
• Katie Bundschu was the first female winemaker in six generations of family agriculture
• Connor Bockman appointed winemaker in July 2025, collaborating with consulting winemaker Keith Emerson
• Bundschu Company portfolio includes Abbot's Passage, GUNBUN, Towle Wine Company, and Huichica Music Festival

Rhinefarm Vineyard is the heart of everything Gundlach Bundschu produces, a 320-acre estate established in 1858 and farmed today as a single contiguous property in Sonoma Valley. Its location is geographically distinctive, sitting at the crossroads of the Sonoma Valley AVA, Los Carneros AVA, and Napa Valley AVA, giving the estate access to a wide range of mesoclimates. The 60 distinct blocks are divided between cool valley floor sites, planted to Pinot Noir, Gewurztraminer, and Chardonnay, and warmer hillside blocks suited to Cabernet Sauvignon, Merlot, Cabernet Franc, Petit Verdot, Malbec, Syrah, and Zinfandel. In 1997 the family acquired an additional 140 acres adjacent to the historic Rhinefarm property, expanding the estate's capacity. The entire vineyard is intensively hand-farmed and earned Regenerative Organic Certified bronze status in 2024.

• Rhinefarm covers 320 acres established in 1858, divided into 60 distinct hand-farmed blocks
• Estate sits at the intersection of Sonoma Valley AVA, Los Carneros AVA, and Napa Valley AVA
• Valley floor planted to Pinot Noir, Gewurztraminer, and Chardonnay; hillside blocks carry Bordeaux varieties, Syrah, and Zinfandel
• Rhinefarm received Regenerative Organic Certified bronze designation in 2024

All Gundlach Bundschu wines are estate-driven, sourced exclusively from Rhinefarm Vineyard without outside fruit purchases, which gives the winery a strong sense of place and stylistic consistency across its range. The hillside blocks produce the winery's Bordeaux-influenced reds, most notably Cabernet Sauvignon, including the limited Vintage Reserve bottling, as well as Merlot and Bordeaux blending varieties. The cooler valley floor positions and maritime influence from Los Carneros allow for the production of aromatic and cool-climate styles, particularly Gewurztraminer and Pinot Noir, varieties less common among Sonoma Valley Cabernet-focused estates. The regenerative organic approach underpins all farming decisions, with hand-harvesting across all 60 blocks. Annual production sits at approximately 40,000 cases, balancing craft scale with commercial reach.

• All wines are sourced exclusively from the 320-acre Rhinefarm estate with no purchased fruit
• Vintage Reserve Cabernet Sauvignon is the winery's prestige limited bottling
• Gewurztraminer reflects the estate's cool Los Carneros-influenced valley floor blocks
• Full regenerative organic certified farming across all 60 hand-harvested blocks

Gundlach Bundschu occupies a unique position in American wine history as California's oldest continuously family-owned winery, a claim backed by an unbroken family connection to the same Sonoma Valley land since 1858. The estate demonstrates that a single site can sustain both warm-climate Bordeaux varieties and cool-climate aromatics, a function of its rare positioning at three AVA boundaries. Its Regenerative Organic Certified status places it at the forefront of sustainable viticulture in California, while its commercial growth in 2024 shows the model is economically viable. The Bundschu Company's expansion into additional brands, hospitality, and live music via Huichica Festival signals a modern interpretation of what a family wine estate can be. For students of wine, the winery is a case study in estate integrity, AVA geography, and multigenerational stewardship.

• California's oldest continuously family-owned winery with unbroken family ownership since 1858
• Rhinefarm's position at the junction of three AVAs offers a rare combination of cool and warm-climate growing conditions on one estate
• 2024 ROC certification and 17% wholesale revenue growth demonstrate commercial and environmental viability together
• Huichica Music Festival and GUNBUN brand reflect a contemporary approach to winery identity beyond traditional DTC models