Answer: I should mention I would not suggest transplanting a climbing hydrangea because they take so long to become re-established after planting -- often they take five years or so before they will begin blooming. But if you are determined to move it, I would do so in early spring as soon as the ground can be dug. I would move the Endless Summer in the spring also. The reason for this is with a spring planting it has all summer to become rooted and established before the cold of winter sets in. When you dig, take as much of the root system as you possibly can and replant immediately at the same depth as it grew before. Water thoroughly to settle the soil and mulch. Water as needed throughout the summer as you would any new plant.
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