Proportinately/Compositionately I think it's there.
I'd go big - I'd like to see that bloom staring me in the face and, expecting that the judges have an "eye" will then find that leaf!
Go as large as you can print.
EDIT: Oh, BTW, I think its a great pic and shows so well how the "art" is the "artist". A very nice shot - thanks for sharing it.