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Apr 26, Pruning hydrangea bushes is not necessary unless the shrubs have become overgrown or unsightly. You can safely remove spent blooms (deadhead) anytime.
However, there are a couple deadheading tips to keep in mind for optimal results. Try to keep cuts above the first set of large leaves or only cut down to the last healthy shrubdigging.clubted Reading Time: 3 mins. Mar 25, Hydrangea arborescens, smooth hydrangea.
I recommend leaving the dry, tan flower heads on the plant to provide some winter interest in your landscape, so I wait to prune these until late winter or spring.
Let these plants grow a season or two before doing any serious"hard" pruning. Once the shrub is established and has a couple of growing seasons under its belt, prune these hydrangeas in the spring down to the ground, or not at all if you want a larger shrubdigging.clubg: Chualar CA.
Sep 21, Annual pruning for hydrangea shrubs growing in California should generally be conducted in the fall or early winter once all of the flower heads have died back or when they begin to look shabby in the landscape.
Remove any dead flower heads down to the parent stem, being the green or wood stem from which the flower stem emanates.