Hmmmm. Thanks Tamlin for that information. Now I wonder if Cephalotus would grow better in the same soil derived from the ultrabasic intrusive rocks where Darlingtonia grows near Gasquet. Some time ago I brought home a bucket of that soil with associated herbs and grasses and found that both Darlingtonia and P. macroceras nortensis grew better in that than in any mixes I had tried previously. Unfortunately, I have only a single Cephalotus, so it will take some time before I can perform that experiment.