The lifespan of a Christmas tree can vary depending on the type of tree and how it is cared for. Real Christmas trees typically last between 6-8 weeks if properly cared for. If you water your tree regularly, keep it away from heat sources, and make sure it has enough space for air circulation, it can last even longer. Artificial trees, on the other hand, can last for many years if properly stored and maintained. They are also more environmentally friendly, since they don't require the cutting down of real trees.