To be honest, I don't know a lot about them except they're from rain forests and aren't cacti as people think. I just love to grow them. The parents of the seedlings were killed off in my house freeze last year. Not where I am now. I had the seeds with me so they were o.k.- Since I couldn't find any advice as to how they should be grown from seed, I just "winged it"!
I only ended up with 3 seedlings- but hey, that's better than a poke in the eye with a sharp stick!