I'll be interested in what others say, as I have very little experience with hoya. I have read they like it dry.
But the pot material is only one part of a whole system that includes the size of plant and pot, the type of potting mix, and the environment. which may contribute to the contradictory statements you've found.
Looking for a site:edu should give some assurance of good info such as
http://gardeningsolutions.ifas...
It says nothing about type of pot material.
