White wine grape · Vitis vinifera
A white wine grape with a probable Austrian origin and names documented across central Europe, including Germany's Silvaner.
Plantgrape describes a probable central-European origin in Austria. UC Davis FPS lists Austria and likewise describes the variety as believed native there. Both references record Grüner Silvaner; Plantgrape also lists Sylvaner verde in Italy and Zeleni silvanec in Slovenia. FPS explains that Germany uses the spelling Silvaner, while it retains Sylvaner as the US approved name.
Plantgrape describes steady production but sensitivity to spring frosts, occasional difficulty with wood lignification, and poor suitability for sites that induce excessive chlorosis. These are source-attributed observations, not a frost-temperature threshold, soil prescription or prediction for a particular vineyard.
Plantgrape describes high sensitivity to powdery mildew, downy mildew and grey rot. UC Davis separately records that one accession received under the name Valdiguié (Gamay) was later identified through DNA testing as Sylvaner blanc. That documented correction illustrates why a collection label is not sufficient proof of cultivar identity; it does not make Valdiguié a synonym of Sylvaner.
Reference review · November 9, 2026
INRAE / IFV cultivar reference. Vine-trait observations belong to this reference's context; they are not universal planting or irrigation recommendations.
Independent institutional variety record used to cross-check cultivar identity and naming. It does not independently validate every agronomic observation in Plantgrape.
Cultivar descriptions are source-attributed reference material, not site prescriptions. No numeric soil-moisture threshold, disease diagnosis, regional suitability guarantee or GroundWorx performance claim is established here.