Christmas trees can live for many years, depending on the species and how they are cared for. Fir trees, for example, can live for 30-50 years or more, while pine trees can live up to 100 years or more. However, it's important to remember that a Christmas tree is a living thing, and it needs to be properly cared for to ensure it lives a healthy and long life. Proper watering, sunlight, and nutrients are all important for a Christmas tree to thrive and live for a long time.