Is this a pre-flower or is it starting to flower? And should i stop the LST when she starts to flower or there is no rule to LST timing based on the flowering time? She is an autoflower with 23 days. Thanks!!
The method of lst is to create all the tops at the same height without cutting or causing serious harm. So no, there's no real time to stop but you should reach a stage where you are happy with the shape as its going into flower