Veg to bloom time ?

For indica dominant, switch when its half the size you want. For sativa dominant, switch when it's a third of the size you want. Don't switch to bloom nutes until the stretch ends, they will want plenty of nitrogen during this time.

It will not start flowering immidiately, it will take one to two weeks to flower. And it streaches a lot during this period. So it depends on you. If you want bigger plant, you should wait more, if not then change your cycle to 12/12 ✌️ Cheers and good luck 😉

best thing ive seen is to take it slow with everything cut the lights down to 12/12 slowly like 10 mins a day tell you get to 12/12 give the girls time to get ready make sure you give um one last good trim and take any clones your gonna take now about a week before flip i like to hit um with a pk booster here myself best of luck bro have fun n keep it simple

During flowering plants will double the size they were the moment flipping to 12/12. Eyeball your plants and flip when you think they will cover double the size they're now. Keep feeding vegging fertilizers at least two weeks, the third week you can do 50/50 flowering/vegging or switch entirely to floweting feed. Happy smokes!

I usually flip flip all my plant on a water day , I’m on a feed feed water schedule. So I don’t lockout any nutrients between flipping, and I just cut the light cycle shorter from 12 to 12

What do you mean exactly? How long does it take to go from veg to flower after switching? When to switch? It will help a lot if you explain it more.