Attachment 290475Attachment 290476

Ok it's been around a month and my plants are getting nice and big. I was wondering what size pot should I use for when I start my flowering process. I'm going to get a hps light system to help flowering. Where will the flowers start to form so I can Remove the male plants. And also will the male plants produce bud? And what will happen after my plants finish their cycle? Will they die? What type of problems should I expect