UPDATE:
Day 39 of flower. We're doing just okay. The front plant is the Gorilla Zkittlez, Rita. She's doing great, no real issues with the leaves.
The other two, in the back, are Mimosa EVO and they are not playing well. I keep having issues with yellowing and brown areas on the leaves no matter what I do to try and correct. PH is good, watering frequency and feed is good, and the nutrients are fresh bottles....except one. The Botanicare Cal/mag is from a few years ago, it had been stored in the basement. I started having trouble with these two plants when I ran out of my General Hydroponics Cal/Mag and had to switch to the Botanicare.
Personally, at this point, I believe the shelf life of that Botanicare Cal/Mag expired. I've read that once opened they have a shelf life up to a year, and unopened can last up to 5 years. Considering my last grows before I came back to the site were in 2017, I believe this stuff is just too old even though it was unopened.
I am ordering fresh GH Cal/Mag today. I'm hoping that is what the issue has been. Buds are doing fine, but those leaves just suck.
So without further complaining, here they are today: