Edit: I can see the photo now. I really don't like selective color. It has a place somewhere, but its a very small place where most photos don't live. That said, don't take it personal, it just is what it is. I do like the shallow DOF.
I like the photo but like other says ditch the selective color. In my opinion it would look better if you were to just get a solid focus on the flower you want which would give a slight blur to the other. I think that would give you the same attention to the foreground that you seem to be seeking with this shot.
Here's one I did lately which is what Im talking about... DSC_0020 by mshipman89, on Flickr
Heres one without selective color but has the background colors faded to draw attention to the foreground... DSC_0024 by mshipman89, on Flickr