I agree with comments above, and concentrating on growth first is good.
One thing to bear in mind is that often new phals can take 18 months to 2 years to settle back into a good blooming pattern.
When they are grown for the comercial market they are often forced to flower 'out of season'. They do this by growing them warm for about 18 months, so warm it inhibits spiking, then they drop the temps for the greenhouse and pretty much every phal will start spiking at the same time, regardless of the season. The result of this is that the plant has it's natural cycle messed up, and when we get them home they can take more than a year to get back in to a natural cycle.
As has been said above what triggers a phal to flower can vary, but the fast majority of the ones sold in the mass market (NoIDs) have a lot of parentage of the ones that respond to temperature because that's part of how the growers like to control them.
What the growers are doing is actually a more extreme version of what you suggest. Let them concentrate on growth first... they take it further and inhibit flowering to concentrate on growth, but I don't suggest that for you at home