Markko Vineyards is a winery founded in 1968 in Conneaut, Ohio, by Arnulf W Esterer and Tim Hubbard. With the advice of viticulturist and winemaker Konstantin Frank, the winery was gradually able to produce wines with Chardonnay and Riesling vinifera grapes successfully in the cold northern Ohio growing environment.
The approximate location for Markko Vineyards is 41°54′N 80°37.41′W.
References
Markko Vineyards Wikipedia(Text) CC BY-SA