"Having abandoned its sombre dress for a scintillating splendour, it is transfigured and becomes the messenger of a light that is not its own but bears witness to the true Light that comes into this world. This tree's destiny is comparable to that of the shepherds: while they were watching in the shadows of the night, here they are illumined by the Angels' message. This tree's destiny is also comparable to our own, for we are called to bear good fruits to show that the world has truly been visited and redeemed by the Lord. Standing beside the crib, this fir, in its own way, demonstrates the great mystery that was present in the simple, poor place of Bethlehem. To the inhabitants of Rome, to all the pilgrims and to all who will visit St Peter's Square through the television images broadcast across the world, it proclaims the coming of the Son of God."
The ‘fir’ tree was used by the Northern pagans to celebrate the winter solstice because it was a green tree in winter. The same applies to mistletoe and holly.
Nobody wanted to decorate a barren hibernating tree.
Furthermore, the fir tree does not ‘bear fruit’ of any kind.
A Garden of Eden tree is the exact equivalent of a Chanuka bush. Both do not exist. They are made up constructs by embarrassed people.
You can’t just make stuff up when you don’t like reality.
It is a Christmas tree. That is what it is. It will always be a Christmas tree no matter how many new name are plastered on it.