To put wide ribbon on a Christmas tree, start by cutting the ribbon into long strips, approximately 3 to 4 feet in length. Then, tie the first strip of ribbon around the top of the tree, and work your way down the branches. You can wrap the ribbon around the branches multiple times to create a fuller, more vibrant look. Alternatively, you can use multiple pieces of ribbon to create a more textured look. Once you've finished wrapping the ribbon around the tree, tie off the ends and trim any excess.