I like the composition, the eye is drawn around the subjecy by natural lines and the "frame" and is always brought back to the subject in a smooth and gentle way.
I like the banding of the background colours and the diagonals of the foreground, both of which compliment the strong vertical of the subject.
The subject is well focussed and interesting in its own right.
The only "negative" points I can find are that the composition does not follow the "rule of thirds" so is not a "classically" good composition (a minor point indeed as I find the the composition pleasing) and that the plant head behind the subject, being of a similar tone to the seeds on the subject itself, are slightly distracting from the "clean" shape of the subject.....
Cracking photo though and one I would be proud of if I had taken it!