Quote Originally Posted by oldmac
I think this myth got started by someone not understanding the use of 36-48 hours of a dark period between vegative and flowering. This btw does have an effect on how fast a plant makes that transition.

Hope this helps and is maybe some food for thought. :thumbsup:
OM
More food for thought is that this dark period before flowering is strain dependent.


I've alway's used 36 hours of dark before shifting from 18/6 to 12/12,

While I don't have a full grasp on it's effect, I can say at least for my blueberry strain it was a detriment.

I did a blind grow resulting in high stretch, and 2 day's delay in the onset of flowering in the "Dark cycle" girl

The 2nd plant was simply swapped to 12/12, and actually received an EXTENDED light cycle! around 24-28 hours, most was under the blue of the MH (14-16 hours), the latter was under the red of HPS.


I'm not going to actually log this grow, so it's just speculation See sig line.