Pseudolithos migiurtinus and Cubiformis
I am still in process growing some of those from seed, now a year in and its a slow slow process. Anyway, at times I do come across a reasonable priced Pseudo, yet not often, those things can come with a hefty price tag.
Both my Migiurtinos and Cubiformis are about a year old and a inch in size.. Migiurtinos nearly doubled in size within a year, in contrast the Cubiformis did pretty much nothing. Both the same soil the same sun etc...At least I did not manage to kill him either, so fingers crossed.
I am just a fan of this Frog warts little balls, so much fun.
I Keep them in super fast draining soil, mainly gainly gravel like, water all 2 weeks, when giving them a ever so slight squeeze you can feel a subtle difference after watering and when the plant starts to dehydrate. Pretty much full sun when possible and I read in a post from C&D that those fellas love hot temperatures.
The only things is that my Cubiformis shows only a slight touch of this cube shaped form some wonder if its maybe a hybrid and not pure Cubiformis. Bummer
Migiurtinos below
My Cubiformis below