Stirm Wine Co. Riesling Wirz Vineyard

The old Wirz Vineyard was originally planted around 1900 to “mixed blacks” as Pat Wirz, the longtime farmer/owner likes to call them. The mix is the typical field blend of vineyards in the Diablo range that consist of Mataro, Carignan, Zinfandel, and the oddball Cabernet Pfeffer. However, in 1964, about 45 acres of white Riesling were planted. The San Andreas Fault runs through the vineyard, which sits at the base of the Eastern flank of the Gabilan Mountains. There are several different soil types found here. The Riesling is mostly planted on deep granitic sand, and some is on the darker clay loam that’s weathered from limestone. Dry farmed, head trained, and organic.