R-HST was selected for its exceptional oenological properties in Riesling from trials conducted 1991 to 1996 in the Heiligenstein region of Austria. R-HST has a short lag phase and generation time, even at cold temperatures. These features allow it to dominate and persist over spoilage yeast such as Kloeckera apiculata, where other Saccharomyces cerevisiae might have difficulty. A relatively neutral strain, R-HST retains fresh varietal character while contributing body and mouthfeel. R-HST produces crisp, premium white wines intended for aging. R-HST is best used when the most transparency between a fruit and a finished wine is sought. This can be useful for showcasing quality fruit and terroir differences, as well making sure original fruit characters are retained in a final blend. Best results from 50 to 86 degrees F, with an alcohol tolerance to 15%.
