On average what would you guys say the growth period is? Im in my 4th week right now, there 4-5" tall. I think everyone says 8-10" then flower

Thanks, I wasnt sure about the 12/12 cycle.

Also this Mycorrhizal stuff (micor-he-zie) I think it's pernounced? Theres a post in advanced growing techniques about it. A place here in town sells it for only $9.99 pleanty enough for 4 plants. Anyone know the dummies guide to this stuff? Alot of stuff online is kinda techy