Wine yeast good for both red and white wines. 1 packet sufficient for 5-6 gallons. See details for more info. Red Star Cote des Blancs (Davis 750), a strain of Saccharomyces cerevisiae, has been derived from a selection of the Geisenheim Institute in Germany. It is a relatively slow fermenter, identical to Geisenheim Epernay, but producing less foam. This yeast requires nutrient addition for most chardonnay fermentations. Cote des Blancs produces fine, fruity aromas and may be controlled by lowering temperature to finish with some residual sugar. It is recommended for reds, whites, sparkling cuvees and non-grape fruit wines (especially apple, it is reported). Ferments best between 17¦-30¦C (64¦-86¦F). Sensitive below 13¦C (55¦F).