Q.Replanting a cut Christmas tree
I just read your article from June regarding planting a cut Christmas tree. The article says you can’t … Nonetheless, my tree is over a month old now and it has not browned. Moreover, in the last week, it started sprouting all over with new growth … How is this possible?

The new vegetation you are seeing is coming from buds that grew on the tree before it was cut. This article explains why it happens:
http://msue.anr.msu.edu/news/why_is_my_christmas_tree_beginning_to_grow
Unfortunately, the tree won't be able to grow outdoors, because it will eventually exhaust its resources and won't be able to grow new roots.