Things You'll Need
Tree stand with water reservoir
Reviving a Christmas tree is as simple as giving it more water. The more water you give to the tree, the longer it will last, just like cut flowers. It is important to ensure that the tree has enough water and is protected from extreme heat to prevent the needles from drying out. Do not use chemicals or sprays to try and revive the tree -- these do nothing to improve the water retention of the tree and might actually prevent the tree from getting as much water as it needs.
Plan to place your tree away from heater vents or fireplaces. This can cause the tree to dry out unnecessarily fast. If your tree is placed near these objects, then move it to a better location. An area that is away from direct sunlight also is best.
Saw 1 inch of wood off of the bottom of the trunk. You can do this again if the tree has already started to wilt or dry out. Simply remove the trunk from the stand and saw off the bottom inch. Saw the stump flat for best results. Discard the cut piece.
Place the tree in the tree stand. Fill the stand up with as much water as it can hold, or at least 1 gallon of water. The tree should initially have a supply of 1 qt. of water per inch of thickness of trunk.
Check the water level under the tree every day. You should refill the stand whenever the water level drops below the trunk level. A tree should receive about 1 quart of new water per day, although the tree might take in more water initially.
Use only low-heat decorations on the tree, such as mini-light bulbs. If the tree already is dry, you might want to skip placing any lights on the tree at all, or only turning them on during Christmas Eve and Christmas Day.