Looks like you have a mag deficiency......are you sure your mediums pH is in range? I'm betting your pH is low.... I've read previous posts but still think you should calibrate your meter and check again. Wouldn't cost you anything to fix that. I hope that's it anyway. I'm near Somerset, KY just moved from OH in Nov
Checked the PH this morning .I'm still showing a pH of 7 not a problem .I've been feeding a combo of mag sulfate , molasses and kelp as a tea since they were transplanted,along with fish fertilizer during veg. Did a couple foliar feeds of calcium nitrate and kelp early on. I replaced the fish fert with liquid kool bloom (0-10-10) near the end of stretch.
I used Captn Jack and 3n1 product on an every other week rotation to control pests. Mycostop and Serenade in 14 day rotation to help prevent pm and botrytis . I sprayed neem at one point when I had mites moving in.
The thing with this malady is it doesn't affect the entire plant and some of the flowers grow through it, although at a slower rate as in the before and after pics #24 of this thread.
Off topic I can remember Gov. spraying paraquat in the 70's.