Word has it that there was a little bit of a glut of Frontenac grapes in Minnesota this fall.  This may not be totally surprising considering the amount of Frontenac vines that have been planted in the past 5-7 years. While the number of MN wineries continues to grow, it may not be growing at a pace to keep up with the amount of vines being planted. This is sure to change, although the same issue may rear it’s head again five years from now when the first harvests of Marquette grapes begin to fill vineyard bins.