What causes a Catt to Bloom?

[Gwenchanter]

I've been growing Phals for a while and it's easy to get them to bloom: Make sure they have good roots, then in december when the temps go down at night I start seeing little spike nubbins.

Catts confuse me though. What triggers a Catt to bloom? I have four of them and none are blooming but lots of people brought in blooming Catts at our orchid society meeting. How come mine aren't blooming? Two of my BLC.'s had flowers in early December when I aquired them but they fell off and I guess they're resting. Will they bloom again when it gets warmer? more humid? more sunlight?

My third Catt., also a BLC. I've had since last June and it hasn't bloomed. I bought it at an orchid show and at the time it was not in bloom but they told me it was blooming size and should have it's first bloom soon. It seems pretty happy and even grew a new psudoblub but no flowers =(.

My last Catt is a Potinara which I acuired last winter. Over the summer it made two new psudobulbs but it's been a year now and still no flowers =(.

Please help!