Great background and colors, but the lack of sharp focus bothers me. I know it is very difficult, if not impossible to get focus of parts that are not equidistant from the lens, but yo need to narrow down your subject and be sure to get that in as sharp a focus as possible. (at least for me!)
Example:
What is the most important part of this bloom for you in this image? If it is the black stigmas and the pinkish center, then zoom closer and get them in focus.
You have two or three of the large purple pieces in focus, but the others out of focus. A smaller aperture might get more depth of field even though more background might appear, but that might help. Did you try spot metering, or center metering? Sometimes spot can change the lighting and background.
If the center is you main subject, maybe zoom right down on it from above filling the frame with it which would not include all or any of the large purple pieces.
The green"ball" just at the base might be interesting, too.
Beautiful bloom. I can see why you stopped to take the pic.