Posted: 08/02/2016 at 12:16
Jekyl, I am talking about the PANICULATA ...the PG's......hydrangeas. The description said Butterfly a variety of paniculata.
Paniculatas are pruned hard as you like or less according to how big you want your flowers to be. Your macrophyllas just need old flower heads removed as you say. Cut to the ground and you will lose the flowers this year