How do you get long spikes on Phals?

[StanTheMan]

Hello everyone. So this has been wandering my mind for a while. I'd say I got my hand on basic Phal culture (none killed, rebloomed quite a few), but I have noticed that in some that I've bought with long spikes (some even have had more than 5 nodes before the first bloom) and with big blooms, when they rebloom for me the spike isn't that long and blooms aren't that big. Yes I do sometimes skip watering on time, so maybe it's just that? Or is it the nursery heat and humidity that plays a key role on this?

Thanks in advance,

Stan