Bia blanc Bia blanc Bia blanc is a white French wine grape variety that is no longer commercially cultivated for wine production with only a few plantings existing worldwide in viticultural archives and experimental vineyards. The exact origins of Bia blanc are not yet known though ampelographers have noted that the grapevine shares some morphological similarities to the red Isère grape Peloursin, one of the parent varieties to Petite Sirah (Durif). In the 20th century, ampelographers Louis Levadoux and (decades later) Linda Bisson categorized Bia blanc as a member of the Pelorsien eco-geogroup along with Durif, Béclan, Dureza, Exbrayat, Jacquère, Joubertin, Mondeuse
Creston District AVA acres with 1,365 planted in vineyards. It lies on an old erosional plateau at the base of the La Panza Range with alluvial terraces and fans of Huerhuero Creek. The area is in elevation. Average annual rainfall is . The district's soils consist of old, well developed terrace and hillside soils; mix of granite and sedimentary rock. The most widely planted varieties in the Creston District AVA are Cabernet Sauvignon, Syrah, Zinfandel, Merlot, Petite Sirah. Creston District AVA Creston District AVA is an American Viticultural Area located in the south east portion of the Paso Robles AVA in San Luis