I'd wate till they are about a foot tall because when you change it to 12/12 then you'll have enough areas to tell if the plant is a male or female and you can intro duce food to them but you have to give them a very weak food mixture and read what your girls are telling youthe tiger bloom is 2-8-4, and i think i got some time before they need to be moved but i have 2 20watt grow tubes, and a 150 watt incondecant grow light which puts off alot of heat
when do you think i will be able to sex theses guys
its mostly up to you but I would use CFL to help pervent streching juring veg mode and you can have it closer to, my girls have doubled in side and the main stalk (the base) is abot 3 times thickerawesome
what about that 150 watt incandescent should i change to cfl more usable light?