Unscientifically....with a small sample of on 5x...my plants have had less stress and shown better transition from 24 hours to 12/12, with three days of darkness between. (72 hours, plus or minus).



Although variability always exists....

-it could be I've been better at temp/nut management
- it could be different strains....

But I just did this...just took a pair of ladies out of darkness and I was pleasantly surprised they looked more vibrant and healthy after dark phase than before....

So your call. But day 1 into darkness =day one into Flower...by my count
genuine Reviewed by genuine on . Veg to Flower Question Im growing under 18/6 veg now and plan to go into flower soon Is there a time period i should wait before switching to 12/12? Or like when should it be done? Just when the lights go off switch the timer to 12 instead of 18? Or is there some kind of period they need of darkness? Is it going to matter really? I think ive read something like 36 hours of darkness then switch to 12/12? thanks so much Rating: 5