Earlier this week, I introduced you to Windham Vineyards and the unique hybrid grape St. Pepin. Today, I've got another new-to-me grape to talk about: Frontenac Gris. Wikipedia doesn't have a specific listing for Frontenac Gris (just Frontenac), but I was able to dig up a little information about it on the University of Minnesota site (where it was developed): Frontenac gris, the white wine version of Frontenac, started as a single bud mutation yielding gray (thus named gris) fruit and amber-colored juice. The vine exhibits the same optimum growth characteristics as Frontenac, and requires the same cultural practices. Arching…