Some three weeks ago I decided to deal with the yucca in the brass pot in the front room – it had nearly reached the ceiling.
All the books say that you can simply saw the trunk off, halfway up, and it will strike out again. If you like, you can replant the top end and it will strike roots. I must say, I was extremely doubtful!
Anyway, I went ahead. The remains of the trunk were re-potted and put outside, and the top was potted in a fairly free-draining mix.
Today, there are the first signs of life in the old trunk. yippee!