Unless your PK brand contains plant hormones, PK on its own has no connection to triggering flowering. Sometimes the Sativa genes. This is often the results of the breeder not taking a line to a stable generation.
are expressed as a phenotype
are expressed as a phenotype
Really there is only a couple of things you can "try". One is to pump it with a high PK fertilizer, but if its a photo then you are shit out of luck. The other thing is to start dropping the lights on regime. If its a light sensitive photo, that might trigger it into flower at 18 hours on, 6 hours off. But you might have to drop is down further depending.