It's an indica, so rule of thumb is when its half as tall as you want it to be when it finishes.
You have to take into account whatever training you plan on doing as well.
Hello I think you should wait a couple of more days for the plants to heal and then put them in flower. Remember the stretch may be up to 15 more cm. Good Luck. Chuck.
Plants were at 50cm, I tied some branches down, now I guess height 30cm,
Still not sure how long I should leave it, or what to look for, as to when I should flower...