I put a bottle of Brauneberger Juffer Riesling (Fritz Haag) in the freezer to
chill and forgot about it. This is a delightful light wine with a little
spritz. That spritz was lost in the thaw, and the wine was a little blah.

Any German, Loire or other wine with secondary fermentation would, I suspect,
be harmed by freezing.

Tom Schellberg