If your plant is indeed Alocasia x calidora, it is probably the selection that produces very few babies. You see, when I did the cross and grew off the progeny, some of them were very prolific and some were very stingy with the babies. Since I was not the one who chose the plant that was put in culture, I did not have the opportunity to choose the one that I considered to be the best selection.
Your plant will eventually produce offshoots if you replant it so the trunk is partially underground, as you described. Also, if you can slant the trunk (or even lay it down) when you bury it, that will increase your chances of getting offshoots.
I have Calidora selections that make babies when they are pretty young, but these are not on the market. I also have an F2 that has somewhat bullate leaves and produces a fair number of offshoots - this plant I did cross successfully with A. robusta. One of those seedlings is fairly prolific with babies, as well.
LariAnn
