The grape variety comes from Germany. It is a white wine variety, so the name is misleading. The multi-layered berry color plays between gray, pink, red to violet, but the color depth is not sufficient for pressing one red wine out. Presumably it is a color mutation of the sort Sylvaner (Green Silvaner and Red Silvaner). The Franconian winemaker Johann Kaspar Steinmann (Winery Schloss Sommerhausen) discovered in 1964 in a vineyard a stick Blue Silvaner. After many selections, he hired one 12 years later clone the Bundessortenamt for register examination. This test was completed in 1984 and the variety Blauer Silvaner ST25 entered as a yielding grape in the list of varieties. This particular clone is the property of nursery Steinmann, who is also registered as a conservation breeder. The medium to late-maturing vine yields fruity white wines with herbal aroma. In Germany, she is among others from the wineries Monastery Pforta (Saale-Unstrut) Deppisch and Castle Sommerhausen (Franconia) cultivated. In 2010, 38 hectares of vineyards were designated in Germany (Kym Anderson ).
The many names or Synonyms suggest that there used to be a red grape variety Blue Silvaner with dark colored berries (Blue Lake Constance grape, Blauer Austrians, Blauer Reifler, Blauer Schönfeilner, Blauer Zierfahndler, Lake Constance Burgundy, Black Austrian, Schwarzer Silvaner, Schwarzer Zierfandler, Süßschwarze and Sylvaner Rouge). This variety was on Lake Constance and in Alsace common.
Pictures: Ursula Bruehl, Doris Schneider, Julius Kühn Institute (JKI)