You can do it from day 1, but the plant won't begin to show sex until about day 30 depending on strain, so its best to leave it on veg for most of the first month. I'd wait 5-7 days.
It won't flower for 30 days regardless of light schedule. You're working against yourself if you short it. Period. It's sea of green. You produce smaller plants, but you do it faster. More bud per year, less yield per plant. You do a 2 week rotation. Plant every 2 weeks. Even the 12/12 from seed guys say to veg for 30 days, and they call themselves 12 12 from seed.
I did 12 12 after 14 days from clone and they are now on day 34 flower and about 2 ft tall. if I cut it down right now I would get more than 25 gs.... how many weeks did you flower those for dan k
12/12 from seed 12/12 From Seed: A Different Way To Grow - International Cannagraphic Magazine Forums Erowid cannabis vault. Check the last 3 links on the page (offsite resources) One's a pdf book. Erowid Cannabis Vault : Cultivation
yeah I was thinking that too.I have a Wonder Woman that I vegged 16 days and a Blue Mystic I only vegged 6 days,the BM just showed hairs 2 days ago(at 24 days old)and is ridiculously bushy,the WW about 15" long(not tall,LST)not bushy at all but budding nicely since showing at day 30.I followed SEEMoreBuds' book.A lot of growers grow 4 ft plants then cut 18 inches worth of branches off midway through budding.I figure save 3 weeks worth of vegging,only trim 6 in. for airflow and top concentration,and there you go.Especially with CFLs, with the limited penetration