I gotta tell yah, I wish the bottom of the bouquet wasn't cut off...I know that may not have been an option, though. The photo seems a bit dull...like the whites just aren't white. I think the concept is good, though.
Pretty flowers, if you had to up the contrast a tad, play with the colors a bit (add a touch of red and magenta perhaps) you would have an even better shot which pops a bit more.