I think you could go either way meaning I like the more abstract colored background  for one look. This one I like, but  I think the background is a bit too washed out. The tree particularly is too hazy and washed out for that depth (a bit grainy too). Would also try some purple in the sky even if it is very subtle because it is tertiary to your green in the foreground and you want to bring the eye around even tho you want it clearly to be the background. Nice tho. Are you putting a border on them in photoshop before printing them?

No need to think outside the box....
    Just make it invisible.