I have never done any certain type of trimming, I pretty much trim through the entire grow that way there is no huge shock all at once. If you start and keep things opened up during the entire grow the plant is used to it and the shock% goes down allot. We can bend, twist, tweak, tie, cage and whatever else you want to add but bottom line is no matter what you do the less shock the plant gets the better all around grow you will have.