A real Christmas tree can last for about two to four weeks, depending on the type of tree and how it's cared for. With proper care and maintenance, a real Christmas tree can last up to six weeks or more. Proper care includes keeping the tree hydrated by watering it daily, keeping it away from direct sunlight and heat sources, and trimming the trunk regularly to allow the tree to absorb as much water as possible. Additionally, it's important to keep the tree away from pets and small children who may be tempted to pull on the branches or play with the decorations.