Poland, like Sweden, is not an obvious wine country. It is too cold and too rainy, with a too-short growing season, for most pure Vitis vinifera. Instead, Polen has planted hybrid grapes that are crosses between Vitis vinifera (for the taste) and a grape from another Vitis family that provides the characteristics required in a cool climate. The Dom Janton Rondo that we drank recently, purchased when Per made a short stopover in Warsaw on his way home from Croatia, is made from the Rondo grape.