Okay I have one for Y'all I have a volunteer moonflower with the yellowing on the leaves ,now there are several others nearby and they do not have the yellow leaves ,already did the epsom salts thing but haven't looked today and that may have worked it's magic by now
Kitt we did ok but the whole state is just a mess another small twister over by Poteau last night ,it rained all night caught a hour break about daylight then more rain all day today and still booming and raining I had to go to the store a while ago cause you know WHEN THE GOING GETS TOUGHT THE TOUGH GO FOR ICE CREAM
My basil leaves were yellowing until I planted them, and then they perked right up. My peppers were stunted, probably due to exposure to some cold temperatures, but they're happy to be in the ground now and are growing noticeably. I have no idea if any of that relates to your problem, though.
The epsom salts pretty well did the trick but checked the ph a couple of days ago found it to be a bit high so lowered it with some copperus that works ok but have to extra carefull..tomorrow i will pick up some Ironite when I have to go to McAlester It being unavailable in Talihina