Given the choice, I will choose a blue flower. Hydrangeas make me happy. They are big and grandmotherly, happy to screen the foundation of a house or peek through a fence, just like these beauties here. Years ago, we moved into a house blessed with a couple of hydrangeas in the back yard---pink hydrangeas. I spent two years watering them with an acidic fertilizer, coaxing them to change from pink to blue. In transition, the shrubs were gorgeous, a fantasy of pink, violet and blue blossoms living in analagous harmony. But if I must choose just one shade for my hydrangeas, it will be blue.