Humboldt seeds/random strains

Hello, since my last update I have changed a few things I took out the Caramell cream from humboldt seed company because it Was not in line with what I was going to be doing.I am now doing a sea of green technique in 1 gallon pots. I got rid of my thrip problem By using an organic chemical known as spinosad It has worked and I see no new marks on the newer growth this next upcoming week I will be getting a new light the Mars tsw 2000 so that should help me with my final yield because the light I am using now is only recommended for a 2 x 2 flowering area and the Mars is up to a 4 x 4 area. One Main question I have is how long does it take a indoor plant to start showing its pre-flowers because I have had it on 12/12 now for Five days and still no signs of sex on any of my plants any information would be greatly appreciated thanks again for checking out my girl and I’ll see you next week!