Sticky - I get mites, we all get mites. Fvck in mites suck ass.
What I do is use Spinosad. Monterey Garden Spray is what I use. It's $16 for a year supply.
Without mites I spray 1x a week. With mites I spray every other day.
What needs to happen is we need to break the reproduction/life cycle.
The only way to do that is to spray every 2-3 days for a few weeks AT THE VERY LEAST. Once all the adults are dead, you still have to keep spraying. There are eggs hatching every day. So we have to kill adults, no more laying any eggs not more future mites. The eggs are hardest to get rid of so spraying and killing all the adults, nymphs and larvae is how we stop the infestation.
Gotta keep at it. After you dont see any more alive. Keep spraying for another 2 weeks every other day.
Sometimes I spray every day. They can get outta hand right quick.
Spinosad is the go to for organic farmers.
The issue with it is that it can kill honey bees when sprayed when flowers are being pollinated. Since cannabis doesn't attract honey bees - problems solved. So its also good for outdoor gardens but be mindful of when the bees are around. To kill a honey bee you have to spray directly on them.
Captain Jacks Dead Bug Brew = spinosad.
Nothing will work totally unless you spray every 2-3 days for at least 3 weeks.
Mites like warm weather. I get them every spring.... wait I gotta go spray my plants brb. LOL Think I'll take a shower too all this bug talk making me itchy.
I hate the fvcking Borg.
GL you to will beat them but you gotta stay on it even after you think they are all gone.
Edit - congrats on your harvest. Pics look great too.
Not sure about the Mg Ca thing. I never subscribed to an Mg deficiency. I don't even think its scientifically possible but thats just me.
Ca on the other hand might be a thing. I have 1 plant doing what you have there.
Some leaves are fine some of the older leaves have a lighter margin. Some new growth has it and some new growth doesn't. Very strange.