My Coral Reef is showing now, it's later than the tall varieties. No sign of Ogon yet. I'm really afraid I would not be the one to ask about Ogon.
I do know that it needs very good drainage. Maybe if I put it in a container it would do better. I get the feeling it is not as drought tolerant as most sedum. Hope to get it figured out this year. Will keep you informed on my process, or lack of it.