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The white grape variety (also VB Cal 6-04, Valentin Blattner Cal 6-04) is an interspecific new breeding between(Sauvignon Blanc x Riesling) x unknown resistance partners. It contains genes from Vitis amurensis and Vitis vinifera. The hybrid was crossed by the vineyard owner Valentin Blattner in Soyhières in the canton of Jura in Switzerland. The late ripening, loose and frost-hardy vine with pink hard-shelled berries is resistant to both mildew and botrytis, which is why it is considered a PIWI variety. It produces white wines with aromas of apricots, apples, limes and blackcurrants(cassis). The variety is cultivated in small quantities in Germany, among others by the wineries Timo Dienhart (Moselle) and Ansgar Galler (Palatinate).

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