Just a touch of soft sunlight adds extra life and depth to your image, especially when its position is at a slight angle to the camera lens, and behind your subject. I like these best because I want to portray the flower as I usually see it in the garden.
All of these photos are still raw and untouched with digital image manipulation, and were taken early morning. One right after the other, at very slightly different angles to the light. I don't see these as perfectly focused shots, but they do help to show what a bit of natural light can add to your image.
Backlighting..............................................A bit more sunlight......................................No direct sunlight.....................................
Other tips-
Much of the time a white bloom should be photographed on a cloudy day or, if it's a close-up, in the shade of your body.
Take several shots of your subject, moving the camera the tiniest bit in another direction for each, and refocusing before snapping it.
Close-ups. Gently hold your breath between the acts of focusing and clicking. Many times a blurry shot is caused by the movement of breathing, rather than a shaky hand.
Watch the way the sunlight travels through your gardens often, then you'll have a good idea of the best time to photograph that special newly opened bloom.