Make your own real trees!
If you don't have any trees around in your yard but, would like a few or at least one here's what I did. Get a very, very large branch that has fallen off or from someone who has cut a tree down. A medium size branch is ok because you can always get small branches and hot glue them all around the medium branch to make it taller and wider. After you have the "tree" part, get either a medium size bucket or cardboard box with a garbage bag in it. Fill with quick cement and put the "tree" part in the center of the cement. Presto!! You now have a tree!!! Hang ghosts or lights on it and whatever else your creative mind thinks of!!! See picture below for reference.