White Widow 1st timer Indoor Fr Seed

Hi all been away for two weeks and I guess the plants have been working hard and growing pretty hard. Am going to do some last min. Training and will flip the switch on two plants and leave the other two to veg some more. Since this is my first grow I'll need all the help I can get so please leave your comments. I am just worried that not all plants are female so please let me know other wise and if u need me to take more photos. I will take better photos of the plants individually and transplant the other 2 3l to 5 l pots. So long for now and I have a lot to do this week. So just to give this post a bit more light. I left for two weeks and I came back and two of my plants went into flowering with me flipping the switch. I don't know if the person taking care of the plants did anything. But got any advice? I am thinking of separating the two flowering plants and go into 36 hour dark and then A 12/12 cycle. And I am going to monitor the other two and hopefully they will switch when I flip the switch. DEALING WITH GNATS- hi guys since I repotted two of my plants I am going to add azamax both leaching in spraying so I can get rid of the fungus gnats. This is an important and I think a crucial step that beginners should do if you use potting soil specially. I mean you can do it before you see any adults flies but i usually do it when I see a few Flies. I repeat the spray twice and then after a week, I never see them come back.