somehow this photo does not feel right. It's hard to put my fingers on it. It could be the centered composition - may be if you moved the stems more to the right and show more of the pedals. May be it's the lighting that's too even, not highlighting only part of the subject. May be it's the nackground that's not controlled well enough. May be the photo seems to flat, not showing depth. I like the idea of different whites and the delicate tones of green, though.