currently i have 5 auto's growing. northern ligths. anyone here know if i can grow them in 24/0 right now there 1 week into veg and have been growing fine with it
I would 18/6 myself. I see no real advantage to 24/0 vs 18/6 -- it just costs you more in power bills, and doesn't give the plant any chance to rest. Plants need rest too, so give them a little dark time.
if your not growing from feminized seeds, heres something to consider. Not sure how true this is but in the medical growers bible it says that "Fewer hours of daylight(eg. 14 hours) increases the number of females. Longer days (eg. 18 hours) make more male plants."
If your plants are already sexed than dont worry about it.