Parentage: New breed by Dr.Gertrude Mayer, LFZ Klosterneuburg.
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
Significance, 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.