Last year I bought two small hydrangea’s that were in rough shape very late in the season, and they died back to the ground. I thought they weren’t coming back this year but they started growing leaves from the base in the late spring! I have no idea what type they are, should I just leave any growth there in the fall or prune them? Is there a possibility they could flower this year? They are located in full sun and I have been fertilizing them about once a month since April.