I have one Limelight Hydrangea bush. One.
I bought it about three years ago for $12 at an Amish nursery. The only thing I do with it is cut flowers off of it in the summer and autumn. It's flowers are amazing. Some are very big, others are smaller, but they are all beautiful.
We cut some the other day, and I put them in a large jar and stuck them on top of my great grandmothers china hutch, and a few on the back of the kitchen sink.