Even worse was the Edelwiese, not a single bud pushed on last years canes and the vine has died back to the ground. There is new growth from the base and that's it. I don't think this is winter damage as the cold we received was in the -35 range but all the canes were on the ground as we did the year before and there was at least 2 feet of snow cover.
What further confirms that it probably wasn't the winter lows that killed the buds but the hard freeze in September 2010 was that the Acadie Blanc vine that is growing against the house, came through the winter with excellent bud survival. It did not suffer the detrimental cold of the September 2010 freeze as it was against the house and a few degrees warmer than out in the yard. But the winter lows it would have experienced would have been very similar to the St. Croix and Edelweise, yet it is know as being less hardy than those two vines. Also interesting is we have nice flower clusters on the Acadie Blanc, 2 clusters per shoot. It will be interesting to see how the vine and grapes mature in this climate. See photos below (Acadie vine and Acadie flower cluster)