Well, if you've taken care of your potted Christmas tree properly, it should last a few years at least. To ensure its health, make sure it's getting enough water and sunlight. Water it regularly, but don't overdo it - you don't want the soil to get too soggy. And make sure it's getting enough sunlight - if it's not getting enough light, the tree may become spindly and weak. If you take care of it, your potted Christmas tree should last for years to come!