Here’s how to keep a Christmas tree fresh longer: Choose a healthy Christmas tree. Trim the trunk (and then trim it again). Make sure your Christmas tree always has enough water. Keep it away from heat sources. Take your tree down before it dries out. Click to see full answer. Consequently, what do you put in Christmas tree water to keep the tree fresh? Keep Your Tree in Water The key to keeping your tree fresh is to keep the bottom 2 inches of the trunk in water, even if that means refilling the stand every day. To help keep your tree hydrated to reduce needle drop add 1 capful of Miracle-Gro® for Christmas Trees to every quart of water added to your tree stand.Similarly, how long do noble fir trees last? Select a Long-Lasting Tree Most fresh-cut trees, if properly cared for should last at least five weeks before completely drying out. Some species hold their moisture content longer than others. The trees that retain moisture the longest are the Fraser fir, Noble fir, and Douglas fir. Accordingly, how long will a fresh Christmas tree last? four weeks Does sugar water keep a Christmas tree fresh? Make sure your Christmas tree always has enough water. Even though you’ve heard people talk about adding things like bleach, corn syrup, aspirin, and sugar to the water, tree preservatives and additives are probably unnecessary. Most experts agree that plenty of plain water is all you need to keep a tree fresh.