When do I transplant?

I start my yutooflowers after germination in the final pot, filled with fluffy soil because autoflowers dont liketranspalnts so much and may stay small if they are growing in small pots. She may stopp growing after taproot hits the bottom and in worst case, she starts to flower. So it may be late for the girl, but i would give her new shoes asap and if you grow photoperiods, it is like gmslave said greeetings, for further questions feel free to get in contact,