Fl people say that when frost hits, the main trunk dies and then shoots new trunks from the base. also people trim them - that is if you can inspect the trunk and find an eye - that's a new growth point - you can saw it off to that point and root the cut-off (if it has good aerials! otherwise you might loose it). and it should produce new growth point. but then it can start looking funny, you know? people usually just take big trunk down and let the rest grow and fill in. But yours looks so-o nice and healthy on top, it would be a shame to top it.
the strangest thing that i found - is you can pinch off the growing tip, like you pinch reg plants and it will not loose the existing leaves, but it might branch from the lower nodes and/or produce more off-shoots at the base....
quote:
Pinch out the center leaves on all growing tips with your thumb and fingers after approximately three to four weeks [of pruning] . This encourages the plant to send out new shoots instead of growing taller and creates compact foliage.
http://homeguides.sfgate.com/c...
