I will be dowrnsizing. I have a large norfolk pine tree it has a small tree growing from the roots..can I remove it from the parent?
Salvaging New Tree From Root of Old Tree
Certified GKH Gardening Expert
If you can get a portion with fully formed smaller roots, and top intact, then it will be possible to do. Otherwise, you might need to take a tip cutting and force rooting.
These articles will help: https://www.gardeningknowhow.com/houseplants/norfolk-pine/