Australian and New Zealand Gardening: My poor Luculia "Early Dawn". Help please., 1 by Seachanger

Seachanger wrote:
This poor sickly plant is L.gratissima Early Dawn.
I have had it for about 18 mnths and it has grown very well until now...It is dying from the top down...When I cut off the dead parts the stems are hollow as though it is dying from the inside.....it is well drained..and in a semi shaded protected spot..I have looked on all the gardening sites and contacted growers
but no one knows anything about it.
Has anyone had a similar problem with another plant maybe?