depends on how tall you want them...
growing alot short? put em on 12/12 now...or wait....
and try starting only one thread at a time on the same subject...

whiskeytango

__________________
Your style will eventually match your grow area and the amount of time and money you like to put into initial setup vs. long term maintenance.-stinkyattic

LED growing- An instructional grow log
Episode 3...Revenge of the LED
Episode 4: The Clone Colonies