When should I start 12/12

SuperSmoker420

Active Member
So, this is my first grow and i just started to LST. I cant really remember exactly when I put em under the light but they are either in their 4th or 5th week of veg. They are really bushy and are about 10-12 inches from top to bottom. I am using a 250w HPS so I wanna keep em short and bushy because light doesnt penetrate very deeply, but I wanna make sure I veg long enough for a decent yield. I also kinda wanna do it soom cuz I have 6 plants in a 2.5x2.5ft space and it getting a bit crowded in there. heres a pic

 
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