A fresh-cut Christmas tree can last for several weeks with proper care and maintenance. However, the exact amount of time a fresh-cut Christmas tree will last can vary depending on a number of factors, including the species of tree, the size of the tree, the environment in which it is placed, and how well it is cared for. To maximize the lifespan of a fresh-cut Christmas tree, it is important to keep it well hydrated, protect it from drafts, and keep it away from heat sources.