1) There are some "holes" in the photograph where patches of the sky are pretty much white.
From the length of the exposure I guess you used a tripod? That would allow both a long exposure for the shaded foreground plus a shorter exposure the clipped sky and distant leaves - and then blend with something like enfuse
An alternative would be to use RAW, expose so the sky isn't quite clipped, and then check what can be recovered from the shadows.
2) If it's somewhere local to you, I think you could have some fun working the same scene in different conditions - I imagine the ground would be more interesting after rain - but the bark might just be darker and less interesting.
3) It could be fun to process the image some more...