#1 condition - Make it HAPPY HAPPY HAPPY!
#2 condition - Depends upon genetics - to some degree the majority of hybrid phals typically will start sending up spikes in the late fall of the year when the temperature cools in the evening - more variation between daytime and evening. Some of the more warm zone phals tend to be summer bloomers - and will start spiking any time. I have about 30 phals of spiking maturity and all but a few of them starting spiking in the normal time frame - however a couple of them are just spiking now.
Another significant influence is when they may have been forced to spike by the grower that you purchase them from - if they are purchased off the normal climatic cycle they may take a year or two to get into our/your normal cycle and bloom/spike in odd times or not at all.
#3 condition - Make it HAPPY HAPPY HAPPY!
What does that mean - for each type of phal give it the ideal light, temperature, nutrients, water..........