LST in flower

yes u can)

It depends on the stem. For LST to be doable, your stems still need to be flexible: you need to be able to bend them up to 90 degrees without the branch snapping. In veg and early flower, the stems have this rubberiness to them that LST needs. By mid-flower, your leaves are more wooden and less likely to respond to LST. Though plants past the window for LST may still be workable for super-cropping, which is an HST technique that can maybe do a little more, works with or without LST, and can be done on plants too mature for LST - up to a point. To super-crop (you should google for photos of this), you squeeze the stem to make it "pop" (which won't work if its too old) and the goal is to pop it without breaking the skin; though with tape on hand, you can tape it if you snap the skin. This causes the stem to "flop" and you then attach garden wire the same as with LST, to the same end although because this is HST that snaps the inside of the stem, it may need to be supported initially before it repairs and springs back up. I didn't need to super-crop but if it was an option where LST wasn't, I would do it without hesitation.

Forth week? I'm with Germany, I'd probably leave her be. About 1-2 weeks into flower (around the end of stretch) the stems and lateral branches become woody and far less receptive to any bending. It's high stress, is all. Something that's preferably avoided in bloom...just in case. Much luck. Looks like she's going to put out quite a bit and you've trained out well, already. Cheers👌

Hi buddy it is too late for that :-) You have to do that at the beginning in the vegiphase 👍 but your plant looks great 😍