Mrs. Harvey ... is one of my favorites and a re-bloomer (a heck of a re-bloomer if I had been paying attention to trimming it back more readily) .. so a bonus, to a beauty !
I love back lighting but oh ... it changes so quickly.
The axiom of being in the right place at the right time, is so true ! Ally way garden.
Bright lighting isn't so bad either .. it brings out amazing detail .. combine it with a white subject and you would think it would be overwhelming .. but not all the time.
A some what black back ground, from deep shade, helps of course.