Hi Nancy, my mom has Phals in Cebu. Her phals are not in pots though. They're mounted. And I don't know what kind they are. She has them in shade surrounding the fish pond which is under the roof of the house (front porch kind of thing) all year long. They bloom for her only an average of once a year around the typhoon season (October/November). I never thought of the temperature drop as an incentive for bloom. But now, it kinda makes sense because during the typhoon season, it is hot and humid during the day and then the showers cool everything down in the afternoon.

She did say that lately, her phals and dendrobiums are always getting eaten by some aphids or something. She's always having to treat them for bugs! Which is wierd because her vandas don't get them. But then the vandas are out in the open and watered daily - so maybe the aphids can't live on a plant that is always rained on or watered? Dunno.