The lifespan of a live Christmas tree can vary depending on several factors, including the species of tree, the climate, and how well it is cared for. A well-cared-for Christmas tree can last for several weeks indoors, with some varieties even lasting up to two months or more. However, it is important to keep the tree watered and away from heat sources such as radiators or fireplaces, as these can dry the tree out quickly and reduce its lifespan. Additionally, once the tree has lost its freshness and starts dropping needles, it is best to dispose of it properly rather than leaving it to dry out indoors.