The German Jacob Gundlach (* 1894) emigrated in 1850 from his native Bavaria to San Francisco. In 1858 he bought land in Sonoma County
(California) and together with his partner Emil Dresel founded a winery called "Rhinefarm". This was in the immediate vicinity of Buena Vista Winery
of the famous Californian viticulture pioneer Agoston Haraszthy
(1812-1869), with whom Gundlach was friends. From a trip to the home Gundlach brought a year later Rebmaterial with, among other things were also Rieslingstöcke. The first wine was made in 1861. This year, Mannheim-born German Charles Bundschu joined the company. His business acumen brought the winery a big boost over the next 30 years, including the construction of a large winery in San Francisco. After the death of Jacob Gundlach in 1894, the company was renamed Gundlach-Bundschu. The big earthquake in 1906 destroyed the wineries and the San Francisco office. However, they continued to work and the wines won numerous awards in the following years. After the death of his father Charles Walter Bundschu took over in 1910 the leadership of the winery.
In 1919, the United States entered the prohibition
in force and the winery had to cease operations. Walter Bundschu planted pear trees on a large part of the vineyards, from the remaining smaller area he produced grape juice and altar wine
, After the repeal of American prohibition in 1933, under the leadership of Towle Bundschu the winery was reactivated under the name "Vineburg Wine Company" and replaced the pear trees again with vines. However, no wine was produced, but the grapes sold to other wineries. In 1973, a reorganization and reestablishment under the present name "Gundlach-Bundschu" took place. Now in its fifth generation, Jeff (President and CEO) and Jim Bundschu lead the company. The historic vineyards of the "Rhinefarm Vineyards" are divided into the three major areas of Home Ranch, Huichica and La Paz. With other vineyards, the total vineyard area totals about 150 hectares. They are planted with Cabernet Franc, Cabernet Sauvignon, Chardonnay, Gamay Noir, Gewürztraminer, Kleinberger (Elbling), Merlot, Pinot Noir, Riesling, Tempranillo and Zinfandel. The premium pure wines (Premium Estate Wines) are made from Chardonnay, Pinot Noir, Merlot and Cabernet Sauvignon. Every year around 50,000 boxes are produced, that is 600,000 bottles of wine.