One does not need a real tree to have the iconic symbol of Christmas. There are many ways for someone to produce a Christmas tree. For example, if you have empty bottles in your house, you can refer to this post and take a look at what was done using these bottles.
They were arranged and put together in order to form a tree for Christmas. But in order for you to become successful in this kind of activity, you have to be creative, resourceful and become patient enough. Keep in mind that replicating what is shown here will not be easy, but if you give your best, you might be able to create your own unique Christmas tree.