Did I veg to long??

I have 2 plants in 3gals that got really big this past month and I regret not putting in flower sooner would I be fine to flower in these or no? I'm running build a soil living organic soil. I just would hate to get a month in flower and lose them to root bound

dude, all correctly grown marijuana plants in containers will get rootbound indoors they love it, who the hell told you it would kill them
no such thing as veg too long? I've flowered in dixie cups, shampoo bottles, garbage cans, five gallon pails, one gallon bags, and a tire outside, all rootbound.
if you cant supply the necessary resources of that size plant in flower then chop off
the excess to a size you can manage correctly, the plant recovers in days man, try a grow bible they free online too.

Or put them in 5 gal pots, and let em veg for another 2 weeks then flower them if they are that root bound. Maybe check root system and if not bad just flower them, they're not gonna die, they just won't get any bigger

Did you top them? If not top then flip. It will minimize the strectch

Top them then flower 5 days after or LST and flower now