Die Pflanze ist seit guten 2-3 Wochen in der Blüt...

Magnesium deficiency , nitrogen TOXICITY and maybe potash lack . Win damage dont damage 360 , you still have some healthy side here and there, here all canopy is overfed and with troubles, very low humidity and strong light could add up to get such state.

interesting. would like to know your environmentals are where its growing. Don't know what diary this is to be a part of but if it follows the other ones the daytime temps are around 22c and night time 16-20c I'd start off by trying to make it a bit warmer like 24-26c day and 20c night. I also look at your feeds and watering habits. Are you testing EC/PPM and getting a good amount of runoff? I don't see that in any of the diaries. I think its being feed to much, and the roots are getting soggy and rotting. The super thin clawed growth is not normal. But need more information.

Windburn is a type of plant damage that occurs when strong winds strip away a plant's protective moisture layer, causing dehydration. Some I see in your pictures look a lot like windburn. too strong wind for too long a period. When I first witnessed it I thought it was making it more aerodynamic but turns out its the way the strong wind strips it and makes it dry out it curls the leaves in a very particular way that's hard to mistake. Probably wrong but you should have an idea of the amount of air that is hitting the plant up there. Good luck.

It looks like you headed for a N toxicity to me. Or your watering habits are a little off, too much or not enough. Have you adjusted your lights correctly for the flowering cycle, 2 weeks in should be around 30 DLI.

1 if you are spraying plant with water stop doing that. Also only water right b4 lights out. It’s possible the plant is lacking light. Also it’s possible you have the watering off. During the stretch you don’t want the soil to get completely dry like in veg. Also check your humidity in the room.