First grow

Hey guys i recently just got up on the board and started my first grow not long ago. Just thought i'd show some pics and explain my setup and get some feedback/suggestions good and bad.

-I started my grow when a buddy of mine gave me some seedlings he had started in some vermiculite from some bagseed on the windowsill in his dorm, he knew i was about to start so just kinda did that as his on little project i guess. i wouldnt have done it with vermiculite but it worked. I put them in my space under 2 24" fluorescents a buddy had given me when he quit growing. I put the seedlings under the lights on 13 Feb.
- I got a 175w MH sometime between 2 and 3 weeks after that and set that up with 2 inline intake/exhaust fans, a fan for the plants, bigger pots, and some FoxFarm Grow Big nutes, as well as a sprayer(which was probably one of the best innvestments). I am running 24/0 until flower. i have done it the whole time and hasnt been bad. Cant yet tell if they are male or female.
-The first picture was 2 weeks ago and less than a month of growth and just put under the MH
-The second picture is 5 days after the first.
-The last 3 were just taken today

Thanks for checkin it out.

Nice Job. keep up the good work. the plants look great!

also, something that i forgot to mention, i would like any advice on whether or not i should trim my plant back or how i should start training it or what to do as far as that aspect goes. thanks

Looking awesome.

As to your other qeustion, I like to LST my plants. as soon as they get long enough, I start bending 'em back.

Update. They are just now entering their 6th week of flower. Here are a few pics(shitty cell phone). The only issues i have as of now really are just not having enough light and nutrient burn. I have been flushing the hell out of it for the past couple of waterings and then im gonna try the Big Bloom again. Any suggestions please let me know. I have also been taking away some of the bigger leaves at about 2 or 3 a day. If anyone could help me maybe figure out how far away harvest is it would be much appreciated