When I super cropped My small lst plat a snap that thing almost off and sense it was an experiment I just left it alone, That bitch grew back with no problem, Sometimes I think they like it when you treat them a little ruff and I have some that split open in the middle of the stem but they always seem to grow back. I think its better to do it on a healthy plant,. I have only done it during veg so far, I have not tried it during flowering yet, But once they heal they get these big ass knuckles and from what I was told those knuckles are like super high ways to the plants it lets the nutes pass threw quicker or something like that?