Answer: The absolutely best time to move roses is in February, while they're still dormant. When they wake up they'll be in their new quarters and will barely have noticed the change - especially if you dig the new hole 18" deep and about 2' wide, then build a cone-shaped mound in the center to drape the roots over. Keep the bud union only about 2" above the finished soil surface, then water well. Rainfall is regular enough in February and March to keep the roots your newly transplanted rose bushes just moist enough to make them happy.
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