My neighbor couldn't get her two hydrangeas to grow. She lives right next door and these were in her front bed. She offered them to me. I said of course! I planted them both, one on the east facing , sand as she had, one on the south facing side. They went gangbusters in my yard, and I haven't a clue why. I don't water it . It gets rain water, that's it. The south facing one is much bigger because wAter puddles on that side. Your bush might look sad when you transplant it, but that's just shock. Give her a big drink every day for a week if it's thirsty weather, like here. If she doesn't perk up this year, she should next year.