Thanks for your question Charles. There are a couple of things that can prevent ES hydrangeas from blooming. Lack of enough direct sun. In our area (Albany NY) you’d want to get at least 7 hours of direct sun per day during summer. Even more is better. It is claimed that they will do well in ‘partial shade’. That may be true in the southern US but, up here in the north, they will flower better with more sun. If your hydrangea grew lush, large leaves but no flowers then it probably isn’t getting enough sun. Not getting fed. Hyrdrangeas don’t need a lot of food but, especially in sandy soils, they do need some. Espoma Flower-Tone would be a nice, gentle option. Don’t feed it now but as early in the spring as the soil can be worked. Without knowing the conditions your hydrangea is planted in I can only offer those possibilities. Here’s a great site that might help your sort out what has gone wrong. http://www.hydrangeashydrangeas.com/