This image is a pleasing and moody and nice overall.
I think it would be improved by re-cropping (better yet cropping in camera) all of the empty space out of the upper left corner. It might help by just rotating the crop to "straighten" the verticals in the image. Putting the Lilly off to the left side of in the center would be better than the position it is in now. Also it might be more pleaseing if you can lighten the darks maybe also.