Answer: It is quite difficult to overwinter perennials in pots at home. If at all possible, perhaps you could list in your sales contract that certain plants will be removed. Agents usually dislike that, so another option would be to transplant them to a friend's garden for the winter, then move them again next spring. As a last resort they can be potted up and kept either buried to their rims in the ground or located in a sheltered area out of the wind and buried to their rims in a heavy layer of mulch such as shredded bark. Another option would be to keep the pots in a cold frame in a shaded location to avoid overheating on sunny days. Last of all would be to try to overwinter them in an unheated garage, the main difficulty here being to keep the roots barely moist yet not wet enough to invite rotting. Also keep an eye out for rodents. Best of luck with the move.
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