modern Christmas tree has not received any gifts yet
You can tell how happy a Nordmann modern Christmas tree Christmas tree is by looking at it. As the tree stresses out due to having run out of water or the room is too hot, the needles start to curl upwards. Because the underside of the needles has the 2 blue lines on them, the trees overall colour changes from dark green to a, not unpleasant, blue green. The more blue the tree, the less happy it is.