Simply put, a Christmas tree should be watered daily to ensure that it maintains freshness. When you purchase your tree, a fresh cut will be made to the bottom, so it is crucial that the tree be placed in water as soon as possible. Once the tree is in the stand and placed in the home, it can drink up to one gallon of water during the first 24 hours. As far as preservatives, we offer a nutrient called Tree Life, which greatly helps extend the life of your Christmas tree. Combine the nutrient with fresh water, pour into your tree stand and voila... freshness! This nutrient is FDA approved and is safe for pets.