Hey dude, man, what a journey your on right now lol. It's manic when things get like that.
Gotta look on the bright side though dude, she's been through a few weeks of hell and's still fighting for the finish line.
I don't wanna keep throwing stuff at you but just got a couple of question
Do you have a fan on the plant, didn't see it mentioned anywhere?? (If I was to guess what's up in the older photo's I'd say it looks like toxicity, salt build up (both probably due to ph being out of whack) over-watering and heat stress)
Have you mixed anything (coarse nutrients) in with the soil at any point??
Oh, btw, if you've got a cal/mag issue coming on then epsom salts will only help the mag, dry 1-2 eggshells in a low oven for a short while, crush them up and poke them into the soil, should clear up the calcium problem in a couple of days
Doobie's correct thinking my seed from Pyramid hated, absolutely hated BioGrow, and nitrogen especially. We've got different strains but it'd make sense to me that they may share some of the same genes from an autoflowering parent, who may also hates strong nutrients. Just a theory...
Really glad to see neither you nor your plant have given up, even if it's just a wee bit you end up with, you'll still be rewarded for your patience.
Just a word of warning, whenever you do get round to ordering a PH meter (from Amazon), make sure it's not being sent from China. 30 days of hell lol.
Best of luck dude, I'll do my best to keep in touch but PM if you need a hand
:smokebuds: