Okay, almost everything grows like mad in my terrarium. Dischidia pectinoides is one exception to that rule for me. I have kept it just hanging on for about one year now. It is about the same size as when I bought it, and it bloomed just as soon as I put it in the terrarium . . . but only once or twice since then.
It is mounted epiphytically on a coco fiber background (just like the stuff you use in wire baskets), and gets sprayed every once in a while. Is it just not moist enough? Does it really like to be fertilized (hard to believe for an epiphyte, when I have tons of epiphytes that just get a little fish emulsion every once in a while)? Who has the secret to this dilemma?