Tomato Leaves Turning Black?

Also cutting and disposing of the lower 6 inches of branches of the tomato plant as it grows in height; helps prevent a number of diseases that can often come from the ground in the first place. It saves the money from the need for purchase of any 'disease curative' product in the first place.

It does occur more often too, if the last crop grown in that patch of soil before the tomatoes was left to die off and sit in the ground before removal and disposing of it.
Soil hygiene is critical to plant health and if growing organically should be practiced for best results... along with crop rotation and growing 'restorative crops' for the soil's more natural replacement of nutrients, in-between vegetable crops. But this of course can only be practiced if there is enough room on the property to have a large enough vegetable gardens to enable this as best practice. Sadly the overcrowding of sights now seen being built doesn't leave room too often for growth of ANY garden product at all. It is extremely sad.