No blooms or late blooms at topof ES
I have several ES next to house on N and E sides. They are 4 1/2' tall and very wide. For the last few years they have been blooming mainly from bottom and not blooming toward top until Sept. never used winter protection before and barely cut back in June. Should I winter protect with burlap and leaves so tops dont freeze and how and when to shape them? North side of house has no eaves so they are not too shaded.also have a hedge to protect them from winds.