nice shot.
did you use a reflector and shot Raw? if you did i think you can get more out of this one.
i just wish the flowers werent as bad looking specially the bottom part.
i would add some contrast, make her stand out a bit more from background.
brighten up her face a bit..
done a little test and really think you should try different edits.
Love the light and the pose. I think Claudio has hit the nail on the head. There is nothing wrong with your photographic ability or your imagination. The limitation is with your knowledge of Photoshop/LR but that will come from posting your images here and getting feedback such as Claudio has done.