Growing Hoya hamiltoniorum Part Two

I have 2 plants now after starting this Hoya over so many times. I was quite shocked that after so much time, my weakest plant put forth a peduncle that actually began to bud up. It was not strong and only manage to hold on to one bud. I have tried growing it in a number of different medias, and so far coconut husk seems to perform the best, but I am still trying to find the right one.