PLEASE ANSWER THIS QUESTION ????

At what stage do you stop tucking your branches using the scrogg method?
End of veg?
1st week of stretch?
2nd week of stretch?
Last week of stretch?
I'm afraid if I keep tucking until the the end of stretch the colas won't be tall.

In my experience it depends on the genetics how much canopy space u have to work with. With a bushier indica I would stop tucking around the first week of flower. With a more stretchy sativa I would stop mid way through week 1 into week 2. Here a pic of my latest scrog. On the left is OG Kush (not so stretchy pheno) and on the right is a Super silver haze. I should have tucked the one on the right a little more.

Like sensi said, there are a bit of factors to figure in when trying to find when to stop(Light power for how much above net canopy you can afford to maximize on and genetics will play a big role). Really it takes time of getting used to your set up and how you want things to be. I would say after the first week of stretch is usually a safe place to stop, then just go from there and improve on your next time around if it wasn't how you liked.

You can only,hope to get lucky scrogging a foreign strain. Especially if its a stretchy one.

Nature of the plant. Some,triple in height. Some dont even double.