Overall, doesn't really matter when you prune ES, just want to make sure soil/light conditions and winter environments are the same for each plant *if* you want each to grow at the same rate. But, if you prune ES right now, you may delay blooming. Beyond that, ES needs some years to become fully established, so most folks' plants are not.

Prune Nikkos only after flowering. You can prune out permanently dead branches from hydrangea at any time, but it's easiest and wisest to use Memorial Day as a benchmark. Once Nikkos' root balls are established, the plant will send up new 6 foot tall shoots each year.

Thank you! That was very helpful!