Yes, it is possible to overwater a Christmas tree. Christmas trees need a certain amount of water to stay hydrated and healthy, but too much water can actually damage the tree. Too much water can cause the roots to rot, which can lead to the tree becoming weak and unstable. It's important to make sure the tree is getting enough water, but not too much. Check the soil periodically and water the tree if it's dry, but don't water it if the soil is already moist.