Using the cover picture or picture #6 why are some...

You have over cooked them bro - less is more 👍

Watering too much or not enough would be my guess as they are really droopy. Feel the pot see if its heavy if so leave it. My plants tend to slow down on drinking towards the end so it's easy to over water sometimes.

Isn't the ideal oh for cannabis around 6.5? Also I see only big bloom amongst you nutes, which is just a base nute which is good...but have you given any tiger bloom or any others? I agree with both under and over water can cause a droop, are the leaves dry and crispy like, or do they feel full and soft?

Over watering, and low humidity

It looks like a couple of things could be wrong. Potassium deficiency, overwatering (your stats say every 24 hours, but are you using nutes or plain water?), feed solution temp is somewhat low. Try heating your water/feed to 69-72 degrees F. You have other deficiencies like nitrogen but that could be because youre at the 7th week of the plants recommended flowering date. Use a microscope to look at the trichomes so you can harvest at the preferred trichome color. I believe youve done more harm and its way too late now, yield will be affected. You live and learn!

overwatering, whch probably caused the nutrient burning, in this case as far i can see, it's potassium. I wouldn't add potassium. I would try to let the pot dry out and don't raise feeding coming week, or lower amount of nutrient starting now, for the coming week.

I agree with both Jeff and Dude. Looks like a bit of both over watering and nute buen, the later probably due the first. Give it more time between watering a, let the soil really dry up

Could be over watering. How often are you watering?