Hydrangea paniculata grandiflora, or PeeGee hydrangea, is a white-blooming shrub that flowers in the summer. Unlike French hydrangea, which has globe-shaped flower heads, hydrangea paniculata shrubs have panicles, cone-shaped blooms that taper to a point that hangs slightly downward. Panicle hydrangea should be pruned in the fall, early winter or early spring after blooming has finished for the season. Hydrangea paniculata blooms turn pink with age and will remain fresh on the shrub for up to two months or more depending on your climate.
- Skill level:
- Moderately Easy
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Things you need
- Pruning shears
- Long-handled loppers
Harvest your hydrangea blooms just as the panicle florets finish opening two-thirds of the way down the panicle. Cut with clean, sharp pruning shears down the stem as far as you like, placing the cut in the boas and 1/4 inch above a leaf axil or bud.
Deadhead spent blooms after they turn pink and begin to brown and die back. Cut down to just 1/4 inch above a leaf node or axil to encourage fresh branching and blooming.
Conduct annual pruning to remove old inactive wood and last season's green growth. Reduce the length of branches to control the height and spread of the shrub and create more dense growth. Cut old wood down to the crown of the plant and place all cuts on newer wood at the desired length, 1/4 inch above a leaf node or bud.
Hard prune your hydrangea every few years or as needed to reshape, resize or reinvigorate the interior of the shrub. Remove up to one-third of the shrub's branches down to the crown of the plant at the main trunk or stem. Work around the shrub as you prune, inspecting the shape after each cut before making the next to achieve a symmetrical result.
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