Answer: Rugosa roses are very deep rooted so when you move one you need to take as much of the root system as you possibly can, replant immediately and then keep the soil moist (not saturated but damp) while it re-establishes, just as you would for any new plant. You would also want to trim it back quite hard to compensate for the lost roots. Do not fertilize it, just water and mulch and be patient while it recovers. The heat of summer is the worst time for transplanting, the best times would be in the fall or very late winter/early spring as soon as the ground can be worked. Between the stress of moving and being trimmed back it will probably skip a year of blooming. Good luck with the move!
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