Lophophora Williamsii aka Peyote

I started growing catus and succulents during my university days when I was still staying @ Upper Serangoon. Build up quite a collection buying them from a collector who imported them himself. When my family shifted to a flat, I sold off the entire collection but I could remember those in the know will always ask for the Peyote. Couple of years back when @ Chaktuchak Market I saw these two lovely looking cactus and bought them at quite a good price, They are doing well and flowers frequently now but I think I keep them too dry. I have tried pollinating the flowers twice without success....

Lophophora Williamsii aka Peyote