I bought one of these 4 years ago, and it grew reasonably well until 18
months ago when a a few leaves started to die. This year 2 out of the
original 4 crowns appear to have rotted taking all the leaves with them.
The remaining 2 crowns appear healthy but just have 2 leaves per crown
although a new strong looking shoot has been growing this year without a
problem so far, but the plant now looks very sparse.

The plant has been growing in a 9" pot. I have never changed the soil
over the period, and wonder if this has anything to do with the ailing
Kentia. I cannot find anything on the web that suggests this is
necessary. I never over-water, using very limey tap water, and
occasionally feed with phostrogen.

Any ideas/sufggestion welcome.