Late Blooming Hydrangea

This is my late blooming hydrangea that I planted last year.  I transplanted it this past summer to this current location (under a White Oak Tree) and it seems to like this spot as evidenced by this late bloom.  I'm hoping that next year It will have more blooms.  Hydrangeas do need a shady spot and tolerates it better than direct sunlight.  The name of this Hydrangea is Endless Summer.  It is supposed to bloom all summer long.