Is she short and bushy due to genetics, because I ...

Add red spectrum to the lighting and reduce blue if you can, it will stretch as far as genetics allow. 2600C is the range you aiming for about the same as a HPS light Get some variation in night and day temps, 10F minimum 20 better In short do the opposite of everything people do to limit stretch

Thanks guys . That was just to get a root spout. The young clone is coming out today as she just popped 3 roots .

It will normally slow down growth for a few days after a topping. I’m glad to hear you brought her back. Her color looks great considering you say she was almost completely yellow. I’ve never done a hydro grow. But she is still ridiculously young. You’ve got her on the right track. I don’t normally see explosive growth till week 5-ish. Best of luck 🌱

Plant structure is controlled purely by genetics and there is little you can do to change this, except growing her with inadequate light to increase stretching, but you will end up with weak and spindly growth. Tight internodes generally lead to dense chunky buds anyhow, so I would be just allowing her to do her thing. Cheers, Organoman. P.S. - two plants in one pot is never a good idea, they will just compete for everything, especially root room.