This might add to the experience with Cephalotus.
Because of the many different ways of succeeding and failing in cultivation I tried to find out a cause for the opposite experience under the seemingly same conditions.
For this I searched for the phenomenon of crown rot in other plants.
This is quite common in cultivation of a great variety of crop plants it is Boron deficiency. I wrote most what I found here with the ICPS.
Boron-maybe a solution for problems like crownrot? | International Carnivorous Plant Society
Four weeks ago I started to apply borax in a very thin solution to one of my Cephs.
This was my weakest grower and I hope to boost it up if this Boron is a limiting factor.
Now all of them got a tiny dose of Borax, since the first one did not show any bad results. It even started to grow again.
Here a small sister plant of the same clone shown before doped two days ago
and my oldest an most reliable one dosed at the same time. We will see if something bad happens.
In all my Cephalotus substrate is some foamed clay which might be already a source of Boron, like Turface probably is.
My plants are really healthy and I would like to get one with the symptoms of Crown Rot to try Boron on it.
But maybe someone else is willing to sacrifice one for this experiment, if mine don’t show signs of Boron poisoning within this year.