Answer: I would move these in the early spring as soon as the ground can be worked, this allows them an entire growing season to become re-established prior to the cold winter weather. I would not move them now, especially since you are in zone 4. I should mention that I would not recommend transplanting the climbing hydrangea if you can avoid it, the reason is that this plant seems to take a long time (say five years) after planting before it recovers and begins to bloom. Good luck with the move!
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