Hey; I’ve been LST-ing Autos for several years. Yes, by the time 3 weeks comes up they should be almost flowering and the main stem is certainly woody. So yes, late start.
Here is my process but I don’t recommend doing any fimming or topping on Autos until you have a few Auto grows under your belt.
I fim or top when she has her 3rd or 4th set of leaves. Then as soon as they recover from that I start LST.
As I LST I try to tuck fan leaves that are blocking sites. If they won’t tuck they come off. However keep it to a minimum until they are budding because until then she needs the fans.
This is end of week 3 veg of an Auto Cheese that has been topped once and LST’d.![]()
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Same girl 1 week later transitioning into flower.....

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