Cream Caramel

ADVICE NEEDED! This is my 3rd grow and I aimed to make it great avoiding previous mistakes, but I think I made other ones, even worse. I think this grow will be ruined :( So to make a good picture of situation: These plants been kept on window ledge since germinated for about a week. On their day 7-10 since germination I re-potted them to final pots and placed to grow room. Plants had only cotyledons and just showed sign of first leaves 2 things to note: medium I used is coco coir from previous grow. I didn't treat it any way. It was just flushed with flawless finish (advanced nutrients) before previous harvest. Other thing - seeds grew in paper pots to germinate. During previous grow I damaged roots a bit during repotting. Since I noticed, that roots are coming out trough those paper pots, I decided to keep plants in, and pot them as it is to bigger pots, Since plants been placed to grow room, for first 5-7 days, grow looked better than I was hoping. After first week I noticed stunned grow on one plant. Now is day 14 plants are 9-19cm high (7 of them) and they all started to flower, all have pistils. They are too small for me and I believe its too early to flower as they really small plants atm :( Can someone advice what should I do at this stage? Should I increase feed veg nutrients or should I switch to bloom ones? Is it possible to delay flowering somehow and increase growing? Thanks everyone in advance 🙏