Why are tomato plants are dying?

by Jesse
(Texas)

Q. Our tomato plants have light brownish, grayish leaves. They are sick and dying! Can you help?

A. There are at least 3 possible diseases that could be affecting your tomatoes:

1. Late blight, characterized by blue-gray spots that turn brown.
   
2. Gray leaf spot, which appears first as dark specks which turn gray, then yellow, then brown, and fall off.
   
3. Septoria leaf spot, which presents as dark spots which brown and eventually fall off the plant.
   

All three conditions are caused by fungi. They can be treated organically with a biofungicide or with a regular fungicide.

Good Luck and Happy Gardening!
Your friends at Tomato Dirt