King is right - every plant is different. Some phals have a definite period where they will not be actively growing, while others can be perpetual bloomers and will throw up new spikes as soon as the old one is finished, and then there are some that will start new leaves and roots soon after flowering. You could call this the plant's 'growth habit'. If you haven't been growing the phal long, then you won't know what its growth habit is, but you will learn it in time.
The plant's growth habit is influenced by its parentage (or genes), but also its environment and how you grow it. Nature vs. nurture basically. If we force things, as King says, it can be detrimental to the plant.
If your plant seems in good health then just keep looking after it the way you have been - and be patient.