Hi all, I have my first grow going, 6 beautiful Blue Chesse plants grown from seed. I am trying to get a couple of females.The tallest is 22", the rest are right around 14". Anyway they are in potting soil, under a 400 watt grow light.They are 40 days old from seed. I assume another two weeks and I should be able to sex them, right?I figure the plants need to turn into there sex on there own, right? Do I need to be adding nutrients, they are still veging. I have B.C. Bloom nutrients for my hydro, can I use that even if they are in dirt? I pinched back the tops on all plants, hoping to keep them shorter,and to get bushier, right? Should I have started to pinch them back sooner, or is that going to hurt them? The outdoor temperatures here have been totaly subzero for almost two weeks now, and my little plants are just as happy as can be under the lights.It is just wild to think of these situations! I am trying to keep things simple, I love growing marijjauna! Can anyone help me out on these questions? Thanks, Cybro