your plants need time to veg so they can develop a strong root system which will give you bigger flowers and more of them. there is nothing to say you can't go 12/12 from seed but your harvest will be much smaller than if you gave the plant 3-5 weeks of veg growth time. but it again its your call. i've tried all different approaches over my 35 years of growing and prefer about 4 weeks of vegging after the two weeks of going through the "seedling stage" so in essence its 6 weeks from spout to 12/12.
Now, there's an educated and experienced grower. He/She is exactly right about that too. Which is the same thing I try and explain to these '12/12 from seed fanatics' but I don't think it does any good.
You really need to be patient with Cannabis.. its going to take its time if it wants to.. but then again.. some times.. you get the ones that are quick growers.. and mature much faster than others. It's got everything to do with genetics.. and the plants environment.. as to what will influence how fast/quick your plants will grow.
anyhow, I'm just thankful that someone else around here.. besides me.. realizes that plants need the veg. cycle in order to give it time to produce and develop nice healthy roots. Remember.. the bigger the root system is.. the bigger your yield will be. But again, try explaining that to the people that think they can get more yield from a 12/12 grow... than someone can if they were to give their plant(s) a couple weeks worth of veg.
Thanks for taking the words right from my mouth Shannonball. Also, 35 years of growing?!?!?! Sheeesh! I've only got 2 years of actual growing experience.. 3 years if you add in all the reading I do. LOL... which I can't express enough how important it is.. to read! and read and read and read... especially if your new to growing. That's how I got to where I'm at now.. just reading and experimenting with past grows.
anyhow, I'm gonna get off here and go smoke a bowl.
Peace.