In most cases, no, a cut Christmas tree cannot be replanted. Once a tree has been cut and its root system has been removed, it is no longer able to survive on its own. The cut tree has been separated from its natural habitat and is no longer receiving the water and nutrients it needs to survive. Even if you were to replant the tree in the ground, it would not be able to grow and thrive in the same way it would if it had remained in its original environment.