Several weeks ago after my Lacecap Hydrangea blooms were on their way out, I cut them all off and tidied up the overgrowth and now I am pleased to say there is a lot of new growth. If you wait until spring to do this you will have no flowers because this confusing plant blooms on last year's growth. I much prefer plantings that bloom on THIS year's growth as the Limelight Hydrangeas do. But you do what you have to do.
I found this handy list of things to do in the garden in September. Happy Labor Day. xo