Roesler is a red grape variety that was created in 1964 by crossing Zweigelt and Blaufränkisch, two traditional Austrian grape varieties. The crossing was performed by Dr. Fritz Zweigelt, a renowned Austrian viticulturist. Roesler is primarily grown in Austria, particularly in the regions of Burgenland and Lower Austria, although it has also gained some recognition in other wine-producing countries.

The Roesler grape exhibits characteristics inherited from its parent grapes. It combines the fruity flavors of Zweigelt with the structure and tannins of Blaufränkisch. The resulting wines are typically full-bodied, with deep color, moderate acidity, and a good tannic structure.

In terms of flavor profile, Roesler wines often display dark fruit aromas such as blackberries, black cherries, and plums, accompanied by hints of spice and herbal notes. With aging, the wines can develop additional complexity and secondary flavors.

Roesler has gained popularity among winemakers in Austria due to its versatility. It is often used for varietal wines, but it can also be blended with other red grape varieties to add complexity and depth. Roesler wines are suitable for aging and can benefit from some time in the bottle to soften their tannins and develop further complexity.

Overall, Roesler is an intriguing grape variety that showcases the best qualities of its parent grapes. Its ability to produce full-bodied red wines with good aging potential has contributed to its growing reputation within Austria's wine industry and beyond.