Week 7 of flower and it seems to get close to my first harvest.
The plants are in great shape. Trichomes look good. Maybe could wait a week, but will go for the early chop to see how it affects the end product.
They will only receive tap water once and then be dried for 7 days before the day of harvest
I don't believe your soil is depleted. Roots cant absorb the nutrients that are there when moisture levels aren't correct/ theres not enough dry out. The small root hairs begin to rot when the average moisture is too high. You might have to slightly adjust your watering amount to less, or adjust the time between waterings.. Thats my 2 cents based off what I see