When caring for a Christmas tree, it is important to make sure it gets enough water to stay healthy. The amount of water a tree needs depends on its size and the type of soil it is planted in. Generally, a Christmas tree should be watered every day or two. It is best to water in the morning or evening to avoid evaporation, and to make sure the soil is fully saturated but not soggy. Additionally, it is important to keep the tree away from heat sources, such as fireplaces or radiators, as this can cause the tree to dry out.