I believe it is fact, as the auxins in the terminal bud (the hormones that control growth) move down to the roots during dark time.
That is why you should put to-be topped plants under 18/6 (or any length of dark time).
That is why alot of people put clones under 18/6.
That is the only reason why 18/6 is an accepted setting here at this great community (besides with HID lights, for them to save electricity and cool off).
Correct me if I'm wrong.
superman- excuse me for sorrta highjacking your thread, although I doubt you're around...Although you're on right now....
