Answer: If the roots are going to be damaged by cold, it will already have happened with a temp. of 18 below. Taking them into warmth will only do more damage. Your best bet now is to leave them in the cold garage but insulate them somehow. A hay bale, lots of blankets, anything you can find to insulate them will help. Then, in spring, get them in the ground as soon as possible. This will give them the best chance for survival. Good luck!
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