I think the whole scene is very unevenly lit, which in my opinion is always a problem with photos like these. The light is beautiful in some parts of the image while it's not in others.
I think the leafs lack definition, they are just bright white. All corners except the top left are too bright and draw your eye away from the point of interest, which I presume is the vine on the moss. So I would do some heavy edge and corner burning to draw more attention to the point of focus. I would also crop the bottom part of the vine off, just above the lower section of leafs. I might crop some off the right side too, but not too much since I think the vine needs some space on the right to lie naturally in the frame.
I just like to think this frame has some potential, but it needs some work for sure. I hope that helps.
Mike, I'd echo some of Thomas comments regarding the overall lighting. It is a little uneven, and no doubt difficult to compose an effective image without impacting the balance of the shot. That is one factor that is missing here. The sense of a balanced image. Selective cropping would improve that greatly, also I am seeing a greenish hue on the print, and wonder if the image tone would be improved by a short selenium bath. It might be your scanner though, or my LCD screen.??