As you know, two moves in 2 years will be stressful to the roses. If at all possible, wait until the plant is dormant and leaves have dropped. Prune the canes way back to 12-15 inches and remove small canes. The more soil that clings to the roots and the larger the rootball, the better. Don't let the roots dry out and get it back in the ground as soon as possible. Mulch will be very important as the roots won't be able to prevent heaving during freeze and thaw cycles. Water gently if weather is dry. A plant that dries out is likely to suffer winter kill. Dry air strips moisture from rose canes and with a new location, roots will not be well-established. Use 4-6 inches of wood chips over the base and root system. Remember to pull mulch back in late winter. If you are selling your house, check whether landscape plants are considered part of the sale.
