Answer: Some gardeners leave the old blooms on the plant because they like the look in the winter months. However, if you want to keep your shrub looking neat and clean, you can remove the spent flowers, along with some of the stem. I cut mine back to just above a group of leaves. New stems will form from the cut. You can take 12" of stem when you deadhead, if that will make your shrub look neat and compact.
Enjoy your beautiful hydrangea!
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