Leaf purple edges and veins?
One of my tomato plants is showing some strange coloring on the leaves. The edges and veins on the top of the leaf are dark purple. The leaf surface has numerous small black spots. The bottom of the leaf looks fine - green veins, no spots. The leaf almost has a "sooty" apperance. But the "soot" doesn't rub off. The purple veins had me thinking a nutrient deficiency, but the black spots make me think fungus. I'll try and get a picture to post. It doesn't look at all like the "normal" tomato diseases I get.