Thanks for the tip on feeding phosphorous. My Stapliad gigantea just grows and grows, also puts off lots of blooms. I keep it indoors in winter and it usually gets taken out when the buds start to show up . . . don't want that one to bloom in my house! I do water it with house plant fertilizer when it is inside.
The huernias multiply well but barely bloom, I think I'll try feeding them. I'd love to see more of those weird blooms!