when to flower??

my plant is 2 weeks old as of today. its doing really nice. growing pretty quick. ive been doing 24 hours a day for lights. i dont really have that much room and i am not expecting to get much of a yield out of this..
its like 5 inches tall, got lots of leaves. when is the earliest i could flower?
now?

You can start flowering now but I would wait until it had alternating nodes or at least 4 nodes

I am wondering the same thing.... what should I do to prepare for flowering? im refering to my second grow.

i think i already have four nodes. ill give it a few more days. then go 12/12

one more question
my scedule with class and stuff doesnt let me go exactly 12/12
if it were to be an hour off would this be a problem?

Im at day 21 and i am getting 5 nodes on there.... i think im going to keep these bitches around for mother plants and then clone some of there leafs asap

good plan. i was checkin out your jornal, sucks you cant find any bud. lol might want to get a few more growin!!