Quoted from that article:
"there are 3 stages in the acclimation process. The first actually
started when shoot growth stopped in early summer, and the tree began to
store carbohydrates in branches, roots and fruit buds. So even, at this
point, trees can tolerate about -21°C"
So are they saying the temperatures in July or August could suddenly
fall to about -5 F and the trees could survive that? That's pretty
unbelievable.
I'm also curious, but not really worried, about how my trees will do
considering that November was warm and actually sunny but then last week
we went down to -25F one night.