Njoynit

hummm as to adding warmth. I know someone on another forum who grows crepe mertyls and covers them with plastic(clear) and wraps the branches with christmas lights for keeping them warm enough. yeah it kinda looked strange,but you seen that it actually put off some heat cause he got some snow and was ice sickles dripping from the bags.
My basjoos have never bloomed for me and I'm SE TX zone 8b. I did dig my largest one this year includeing its 1 yr pup and the 5 pups it just set (yeah...a heavy move) I just trim my leaves my off and come spring cut into the top looking for life. I'm relocateing them in spring to a different spot.