Origin: Austria, LFZ Klosterneuburg
Parentage: New breed from Blauer Zweigelt and Klosterneuburg 1189-9-77 (= Seyve Villard 18-402 x Blaufränkisch); by Dr.Gertrude Mayer, LFZ Klosterneuburg.
Vineyard area: 161 ha, 0.4 %. This variety has been registered as a quality grape variety since 2000, and is one of the PIWI varieties.
Important ampelographic features
Leaf: large; five to seven lobes with a heavily blistered surface
Grape cluster: with loose, large grapes; conical; shouldered; and 1-2 wings with small, round blueish-black berries
Ripening time: mid-early season
Importance, conditions: Because of its strong colour, the Roessler variety is used as a blending partner. It is a partially resistant to oidium and peronospora and completely resistant to winter frost.
Wine: Brings red wine with a characteristic forest berry aroma. The colourful grapes yield extremely dark wines - rich in extract, body and tannins.