Christmas trees come in all sizes and shapes, and their life span can vary depending on several factors, such as the type of tree, its age, and how well it's cared for. Some Christmas trees can last for years if they are properly taken care of, while others may only last a few weeks. In general, live Christmas trees can last anywhere from a few weeks to several years, but it's important to keep them hydrated and provide them with proper care to ensure their longevity.