I have a new yucca that is quite mature. It is in the same site in the house that I had a previous yucca, which survived 10 years. This one was bought just before Christmas and already the stem at the trunk is very wet and the leaves and stem are just falling off. The outer leaves of the stem first start to droop but the whole stem complete with good looking leaves just keels over and dies. Is the whole plant doomed? I have not overwatered it, the soil is very dry at the moment, as I didn't want to water it anymore in case that was the problem. Is there anything I can do to stop this from happening to the remaining stems on the trunk? It cost me £30, which I couldn't afford, so I'm peeved if it's only going to have lasted me a matter of weeks instead of years!!