The winery is located in Healdsburg in California Alexander Valley (Region Sonoma County ). The historic farm was founded in 1876 by the two Tuscan wine brokers Giuseppe and Pietro Simi. From the year 1904 the winery was managed by Giuseppe's daughter Isabelle. This sat forward-looking also during the American prohibition From 1920 to 1933 the production continued and stored the wines in the cellar. That's why Simi was one of the few companies to sell wine at the end of Prohibition. Isabel Simi sold the company in 1970 to the oil magnate Russel Green, who sold it in 1973 to Michael Dixon. The heyday of Simi began in 1979, when Dixon's Mondavi upcoming enologist Zelma Long was hired. This carried out a series of quality-enhancing measures. That was among other things stainless steel tanks instead of the big wooden vats and French barriques for the expansion of wines.
The owner-carousel went on, because in 1981 Simi joined the group LVMH sold as a consultant the famous oenologist Michel Rolland (* 1947) engaged. The second winery was acquired in 1982 Landslide Vineyard in the south of the Alexander Valley. In 1989, 40 hectares were in the AVA area Russian River Valley (also Sonoma County) bought. The vineyards now cover a total of 280 hectares of vineyards. Zelma Long became the company's CEO in 1990. The premium wines include the varietal varietals (Varietal wines) Cabernet Sauvignon. Chardonnay. Chenin Blanc. Merlot and Pinot Noir, as well as the Meritage (Cuvée) "Sendal" off Sauvignon Blanc and Sémillon, As a provisional last change of ownership finally in 1999 Simi became the property of the American beverage multinational Constellation Brands,