First Grow ever with 6 Strains 400w MH&HPS

Hi everyone, this is my first grow and I would appreciate it if anyone can help guide me throughout my grow.

I am growing 6 Stains that I got from Mj-seeds.nl's premium seed mix and so far they seem to be doing well. They are now about a month old. I'm going for an all organic grow.

Here are the materials that I am using:

Medium: Foxfarm's Ocean Forest Soil
Light: 400w MH (Veg) 400w HPS (Flowering)
Nutrients/Fertilizers: Foxfarm's Grow Big, Big Bloom, Tiger Bloom.
Location: Indoor Grow Tent
Ventilation: 80 CFM 4 in" Duct fan

I've read guides about topping and feeding them so here are my results in the pictures below.

need help with determining pre-flowering. When does a plant show that?

they look great you should notice the sex by the 10-14th day of flowering

you also have to turn the lights to 12hrs on 12hrs off to get flowering

thanks for the advice. I will now set my timer from 6pm off to 6am on. thank you.

also i am about to purchase a grow tent for my next grow and was wondering the brand of yours and where you purchased it? I am wondering because i read that some companies tents are killing the plants with the PVC material that it is made out of and yours are doing great.

Yeah sure. Here is the tent i purchased, the max of plants you can put in would be six
(3 gallons).
https://www.thelashop.com/product.php?productid=502&cat=46&page=1

I' don't know if they're safe or not but as you said, the plants seem to be doing great.

I've been setting the lights on 12/12 but none of the plants seem to show any sign of pre-flowering or anything. plants have been vegging for 7-8 weeks already. I will post pics later for you guys to determine it's sex or not.

Thank you

Update: Week 8/ 3rd day of flowering

Noticed a problem with one of the plants, seemed like it was overfed and caused a nute lockout so I flushed that one plant and now waiting for it to recover.

Saw Signs of Sex today
Noticed a cone shaped Calyx on 2 of the 6 plants, which means it will mainly become a female. I saw balls in one of my plants and decided to put it outside and for sure knows it's a male. so far right now..I have 2 females and one males out of the 6 plants right now.

Here are the pics below:

Here are updates on the plants, the biggest and oldest one is looking a little dead. I've been feeding it water only because I've just flushed it.
The other two showed signs of pistils and flowering.



Pics: