The lifespan of a freshly cut Christmas tree can vary depending on several factors, such as the species of tree, the environment it is placed in, and how well it is cared for. On average, a freshly cut Christmas tree can last anywhere from 4-8 weeks, although some trees have been known to last longer with proper care. If you want to extend the life of your tree, you should water it regularly, keep it away from heat sources, and keep it away from direct sunlight.