Rockpile, RP15 Wine Yeast Isolated from spontaneous Rockpile Syrah fementations in collaboration with winemaker Jeff Cohn. Moderate speed fermenter with alcohol tolerances to 17%. Used in concentrated reds for a lush, balanced mouthfeel. Charaterized by red fruit and mineral notes. Low to moderate nitrogen demand. Used to make Syrah, Zinfandel and Petite Sirah and other Rhone varieties.