- The Kirschenmann is particularly close to our hearts as our winemaker, Tegan Passalacqua, owns and farms this vineyard. The ungrafted vines were planted in 1915 in the silica-rich sandy soils of the east side of the Mokelumne River AVA. Thanks to the river’s cool waters and delta breezes, these head-trained, dry-farmed vines are constantly protected from the heat.