Ok, I see the Bulbophyllum in question.
Without knowing too much about what kind of Bulbo it is, I'm going to assume it is an intermediate to warm growing Bulbophyllum of some sort.
Assuming it is an intermediate to warm growing Bulbo, drop the temperature down to 60 F at night, every night, for at least 2 weeks; keep the day temperatures at about 75 F during the daytime, everyday, for at least 2 weeks.
After the 2 weeks are up, keep the night temperatures in the low 70's F to mid 70's F, and keep the daytime temperatures at around 85 F - 95 F.
This temperature change might induce some blooming for you.
In the meantime, if you haven't done so already, fertilize regularly.
---------- Post added at 11:44 PM ---------- Previous post was at 11:42 PM ----------
I could probably add that it might need just a tiny bit more light. The green still looks a little too dark green to me.
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Philip
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