I live in zone 5.
Coupla years ago, I got some plumeria stems, thinking they were evergreen in their native habitat.
For 12 months I tried to grow them inside, in too small pots.
Then after I learned some, I transplanted them into larger pots and set them out in the warm summer of 2014.
I brought those inside for the winter, in my basement, with some light but maybe not enough.
They are completely bald now.
I since learned that they do go dormant.
SO I repotted them, leaving about 10" below and 3" above int soil.
They all lost their leaves over the winter but I now understand that they go dormant.
Today I moved them back out to the deck, bald.
Q: do I want to add soil on TOP of what's there, in the supposition that they will root from the stem (like tomatoes) OR do I want to unpot them , add soil below, and put them back.