The first pic is from 2 days ago, now the yellow has turned to brown spots and is beginning to spread to others. I'm hoping it's an easily corrected nutrient imbalance, please help
Magnesium deficiency.. I’ll quote from my book I use for diagnosing my plants
“Interveinal yellowing and irregular rust brown spots appear on older and middle-aged leaves and younger leaves remain healthy. Size of rust brown spots between green veins increases and migrated to lower and finally newer leaves as the deficiency progresses.. Leaves start dying and dropping, possibly curling before falling off”
Some epsom salt should help
Maybe magnesium? Apart from all the negatives sides of growing in full ground if found that those problems occus less then when putted in pots. Or at least more foregivingness