You can do this kind of pruning in any season.

Sep 04, A hydrangea tree is in fact a panicled or PG hydrangea (Hydrangea paniculata) specially pruned to take on a treelike shape. In the summer, it forms at the tip of its branches large elongated clusters of white or lime-green flowers, depending on the cultivar, which gradually become pink or even reddish through the fall. Nov 12, The macrophyllas are only pruned by removing dead stems.

This is a Nikko Blue Hydrangea that was cut down “to clean it up” in the fall. The canes were cut to about three feet tall, and as you can see the shrub has grown back to six feet tall and wide by the following bushleaning.barted Reading Time: 4 mins.

Mar 25, Hydrangea paniculata, panicle hydrangea. Prune back stems to just above a fat bud - called a heading cut - in fall, late winter or spring. These plants have conical-shaped flower heads. 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.