There are buds and then there are buds. It all depends. Blueberries grow buds in the fall, normally and then the plant goes dormant 'till spring. I have seen a few buds swell up a bit during the winter, but the tiny leaves will remain deep red in color, and they seem to survive freezing temperatures OK. Any green leaves or flowers will surely be lost to freezing before spring arrives.

Do you simply mean the buds are starting to swell? As Eric said there are a lot of stages of fruit bud development and only that final few stages are when the cold tolerance of the buds starts to fall. Perhaps being so tight to the wall the reflected head from the building is putting them ahead of schedule?

This post was edited by bamboo_rabbit on Sun, Jan 20, 13 at 20:21

I usually bury any blueberries in pots for the winter. My experience is that if the pot and roots freeze, the plant is dead.

Benny