Viticulture blending. Fermentation tanks are now cheap enough that the field blend is an anachronism, and almost all wines are assembled by blending from smaller, individual lots. However, in California some of the oldest (and lowest-yielding) Zinfandel comes from vineyards that are field-blended. Ridge Vineyards owns the Lytton Springs vineyards in Sonoma County, which were planted from 1900 to 1905 in what Ridge calls "a traditional field blend of about seventy percent Zinfandel, twenty percent Petite Sirah, and ten percent Grenache and Carignan." 39. Goldammer, T. (2015). "Grape Growers Handbook: A Guide To Viticulture for Wine Production". Viticulture Viticulture (from the
Baja California wine industry Petite Sirah than its cousins in Italy. These vines arrived after World War II but identification tags were lost in transit, so no one knows exactly what varieties they are. Many growing and production methods are newer as most wineries have been in existence for only a short time. Many vineyards are new or recently replanted using modern cultivation techniques, improved rootstocks and cultivars. Most wines are fermented in stainless steel. Length of maceration and fermentation depends on the producer. Red wines are usually aged in French or American oak for a period of between a couple to as many