Just wait for spring Jo Ann, talk about color changes.
Yan, you can either call or email Don (SMG) and ask him for the history of S.'Dark Horse'. Email would probably be better.
It sure is a beauty as a mature rosette.
http://www.smgsucculents.com/S...
Peter, nice photos of J. heuffelii 'Aphrodite'. It is lovely, and it has watermarks in the summer. : )