Christmas trees, whether natural or artificial, typically last for a few weeks to a few months, depending on several factors such as the type of tree, how well it's cared for, and the environmental conditions. Natural trees will last longer if they're properly cared for, such as keeping the water level in the tree stand full, avoiding heat sources, and keeping them away from direct sunlight. Artificial trees, on the other hand, can last for years if stored and handled properly between uses.