Having lived in places that didn't allow Christmas trees, I'm always looking for fun and creative ways of getting around it. Having a picture of a tree (that you maybe stick pictures of ornaments on?) is one such Christmas tree alternative.
I love this image because it shows decay and growth. It shows decay through the crack in the wall, however, shows growth through the plant. It could imply that growth and decay aren't too far apart in there meaning and that they are both quite similar.