First impression: The image is reminiscent of classic Asian brush and ink paintings.
Analysis: The stem anchors the form to the bottom of the frame, and that I think diminishes the photo by forcing a ground/figure relationship. Untethered, the plant becomes less plantlike. As a floating form, it becomes more enigmatic and provocative. Nix the stem.
Regarding post processing, I'd set the background value to a minimum of 245, 245, 245. That tweak may require a bit of finesse, as the branches hold exquisitely nuanced detail. Final nit: expand the picture plane so the disembodied form has more room to float.
I am wont to be painfully critical.