Can you tell from photos if early blight?
by A. Lamb
(IF, ID, US)
About 1/4 of our tomato plants had leaf symptoms starting about a week ago. They are watered well, maybe some temp flux, but nothing too bad.
Hard water? Unlikely because all plants would show symptoms. Looking through pics, early blight looks like this? But no necrotic black tissue. Just dried and brown and dead til the leaf falls off.
Killing apical and axial shoots too, they just shrivel up. Other parts of plant look healthy and fine. See if you can tell form the pics. Treatment ideas? Trying to avoid petrol and synthetics.