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Google says, “Tomato leaves turn black when the plant is stressed by temperatures, disease, or herbicide injury.”
Your tomatoes get chilled or frost over?
It’s been 90 degree days for the past 3 months.
I’m only a new gardener but I’ve never seen that before!
I’d take some clean shears and prune the black leaves, assuming it’s not entire plants. If it’s some kind of disease/blight this can help keep it from spreading.
Is this why it’s a “nightshade”?
