m0useanswered grow question 3 years ago are you using it at the suggested strengths?
https://www.thegreengro.com/product/flower-finisher/
it says 1-2 tsp per gal of water that's 5-10ml and your diary says your using it at a rate of 1.25ml/gal
The leaves look so dark though like they have had to much nitrogen.
Leading me to think this maybe a lockout issue? and excess nitrogen locks out calcium.
The spotting on the leaves looks like calcium/magnesium to me, but I could be wrong.
Could try taking a reading of soils PH/EC buy taking a sample and switching it aorund in some distilled water.
1 part soil 1 part water.
Best Of Luck!