Please help!

Thank you guys, I pulled up the light and after few hours they look a lot better. My ph I will adjust to 6 next time? Would you feed them 1/4 of dosage of NH flora bloom? It seems to show K def? Do they show some def of it is light and fan damage?

To much Nitrogen or underwatering (or other issues with the plant taking to little/too much of nutes) My first bet is "Nitrogen Toxicity" When the plant starts growing and go from VEG to Bloom, you need to lower the dose of Nitrogen that the plant had during Veg. So lower VEG Nutes and raise Bloom nutes? Other bet is that you simply let the plant dry out to much, which causes it to look dead and underwatered. My first bet is Nitrogen Toxicity though, because of the colour of the lant otherwise looks really healthy and this started to happen during transition from Veg to Bloom!

And don't give them more N for now, wait untill they start to yellow out a bit first, check if your bloom nutes carry N and if they do don't overfeed on N just to give her the P, so if you have something like 2-3-4 start very gently and see if you can get a hold of something like 0-10-5 or something similar where the P is higher than the K and the N is non existent of very small relatively to the other two.

Hey Mate, Had same issues over here. To my experience it's better to keep pH near 6 during veg. I raise to 6.5 when I'm in the last weeks of flower. I would suggest to adjust pH @ 6-6.1. Sativas, or sativa dominant(like your Green Crack) tend to like this setup more, Indies are more relaxed.. Good luck and happy trails for the rest of the way 🤞 Servus OimRausch

Windstress and the under layers of soil probably didn't have enough time to dry out(overwatering) and i see her begin to show symptoms of either being too cold or being under too much light or having a Phosphorous deficiency. Good luck growmie this should fix your problems.