This is the first signs I see, the parallel lines, and puckering which I have looked up and turns out to be calcium, boron which work together. Then later the leaf will be twisted with heavy veining, and start getting necrotic, missing a lot of the leaf tissue. After I gave them a dose of drywall, the next leaf was about 4 times as large as before with very little dead tissue on the very end. so definitely worked here. I may try to boil some eggshells down to make a foliar spray, I probably really need to lime but neighbors dead yard after following the instructions of local extension office scares me lol