I think if the composition was moved further to the right so that the darker areas of the background weren't visible (especially on the far left), it would be more effective overall. I like the delicacy of the petal.s
The background is balanced, but the flower in the foreground throws the picture off balance (but not in a bad way). The contrast of the tip of the flower on the dark background puts emphasis on the lines that leads the viewrs eye up the flower.