Purple Punch Auto by Barney's Farm

Hi there ! She has been growing well so far, if any of you have some advise about stressing the plant for example LST/Topping and at what time you would recommend me to perform stress I'd be pleased to hear from you since it's my second grow of all time I'm still a learner. Feel free to let me know your thoughts by commenting below ! Thanks all ! Stay tuned, Cheers.