Interesting. Is this a approach particular to citrus? 2-4 nodes under moist soil has always worked for me but I've never dealt with citrus. Also I've always used a common rooting powder with willow bark extract but I'm not sure if it actually makes a difference.
Discussion
No clue. Making it up as I go. You can just try stuff
Only leave 1/2 leaves, you can even cut them in half. Less water will transpire from the plant. Put in shade, you could try a humidity dome as well if you are in a dry area.
If you are able to do a flood and drain system, even better.
Iām not sure if those plants root easily, mulberry, elderberry, sweet potato, mint would be some good ones to start with - give you some success.
The internets say that my key lime tree should be easy to propertate. I have some spearmint I can do too but that stuff spreads like a weed