I like this shot, your model looks very relaxed, your composition is excellent, as is the lighting and dof. I personally like the weeds, they add to the overall "outside weathered" look. I'm also very partial to the way the water peeks out from under the wooden structure in the lower right corner, it's a nice touch.
Well lit and composed shot of a pretty girl. My inclination is to crop out the bottom 'weedy' part, and perhaps turn it into a square format. If you do PS, you might want to then clone out the intruding weeds. All thats of course just my opinion. How you like it is really what matters.