To make a Halloween tree all you have to do is set up your Christmas tree and create Halloween themed ornaments. You can choose to leave the tree up through Christmas. Just change the ornaments to accommodate Halloween, Thanksgiving, and Christmas. Another popular variation is taking an old Christmas tree and spray painting it black. Allow to dry and then decorate. You can even wrap tricks (gag gifts) and treats (candy and other goodies) and place them under the tree.
Halloween Tree Decorations Ideas