Nancy,
I own about 50 different ones and only 10 have bloomed for me. I have one, well now two pots full of Stapelia Orbea variegata for several years now and never bloomed a flower. I just bought one Huernia insigniflora that doesn't want to stop.
My best guess is to feed them phosphate. Comes in ground up stone and sprinkle in the soil and water in. It feeds the roots which helps flower development. I started this during the summer but a lot of mine didn't bloom. Also I can't tell you why mine doesn't have that dead smell to it. Maybe next year when they are more developed. Nothing to look forward to except to get seeds.
Stush
