American Viticultural Areas

Green Valley Overview
Location: Southwestern part of Russian River Valley AVA.
 Size: 19,010 acres; nearly 4,000 acres planted to vineyards.
 Varieties: Chardonnay and Pinot Noir represent roughly 90% of the plantings; Syrah, Zinfandel and Sauvignon Blanc are also popular.
 Soils: Primarily Goldridge Series (Low vigor, marine derived, fine, sandy, dark yellow loam over sandy loam and fractured sandstone) and some Franciscan (light brown, sandy clay loam with higher magnesium content).
 Climate: Region I (coldest of 5 regions on the UC, Davis heat summation scale), foggy, coastal climate with cool days (low 50s to the mid 80s during the peak growing season) and relatively narrow diurnal temperature swings.
AVA Established: 1983
More Information www.greenvalley-russianriver.com
Russian River Valley Overview
Location: Central Sonoma County primarily west of Highway 101 with Sebastopol to the south, Healdsburg to the north, most of Santa Rosa to the east, Guerneville to the west.
 Size: 126,600 acres (over 150 square miles); approximately 15,000 total acres planted to vineyards.
 Varieties: Chardonnay and Pinot Noir are the primary varieties followed by Syrah, Zinfandel and Sauvignon Blanc.
 Soils: The soils in the southwestern part of the Russian River Valley AVA are fine sandy loams to clay loams. The hills are mostly loamy and volcanic in nature. Along the valley floor, the soils are alluvial ranging from gravelly loam to heavy loam.
 Climate: Region I to low Region II (UC, Davis heat summation scale),foggy, coastal climate with cool to warm days and moderate to large diurnal temperature swings depending on the location. Exposed areas are often quite windy.
AVA Established: 1983; expanded in 2005
More Information Wikipedia.org/wiki/Russian_River_Valley_AVA, www.rrvw.org