How to improve your photo
I'm not keen on the way the light comes to a point on the blanket in the background-it's too distracting for me.
I'd crop that off and make the composition more square. This would also get rid of the distracting crease at top left.
Probably leave a little more space at the base of the photo too!
I'd probably have stopped the lens down more-underexposing the flower heads if necessary. The highlights look a little burned out on this image. Then use photoshop to lighten the flower heads more, but keeping the highlights a little less overpowering.
Or you could go the other way and make the whole thing much more high key by using reflectors to really lighten up the background.
I can see the aperture you used, but not the shutter speed. Glad to see you used a tripod,(!!), so you could have dropped the shutter speed right down and used a smaller aperture to bring that front flower into sharper focus. It's always a job for me to comment on focus when I can't do a 100% zoom, but that front gerbera looks a touch muzzy at the top. It's no biggie though because the eye goes straight to the other flowers!
If you like the point of light on the background and don't agree with my suggestion of cropping, try lightening the background in photoshop and I'm afraid I'd be reaching for the spot healing brush in CS5 to get rid of that crease in the blanket at top left!