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The white grape variety (also Geisenheim 9-93) is a new variety between Riesling x Knipperlé according to DNA analyses published in the year 2013. The paternity of Grüner Silvaner stated in the breeding list has been proven to be wrong. The name is derived from the ruin Ehrenfels near Rüdesheim. The crossing was made in Geisenheim in 1929 by Dr. Heinrich Birk (1898-1973). The plant variety protection was granted in 1969. The variety was a crossing partner of the new varieties Ehrenbreitsteiner and Prinzipal. It is resistant to frost and moderate to powdery and downy mildew. The vine produces greenish-yellow white wines with Riesling like aromas of apple, peach and apricot. In Germany the variety is cultivated on 39 hectares (D-STATIS). There are also other stocks in Canada (32 ha), New Zealand (1 ha) and the USA. In 2016, a total of 82 hectares of vineyard area were designated (statistics Kym Anderson).

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