1st grow with diy rdwc

so far the girls are doing good. Had some explosive growth out of the 2 girls. They are loving life. I did bump my nutrient solution up to about 1/2 what the bottles say. I did notice that they are eating and drink a lot more now. I'm a little surprised they haven't started flowing yet. Is that normal? I was expecting to be into the flowering stage by now. I know the bigger one is showing six. And I noticed that I have 2 phenotypes. The bigger one looks to be sativa dominant and the smaller one looks be indica dominant.