Tomato plants got the blight.

[BlueRidgeMark]

I've lost all my tomato plants (homegrown by a guy, about 6" tall when i bought them). They looked great, nearly 4' where I had them tied up on a fence then started going brown from the base up. Any idea what this would be? 10yrs of having good tomatoes till now.

Sounds like late blight. Do a search on it, you'll find plenty of info. Bottom line: Pull the plants, bag them, and out with the trash. Don't compost them.

 

[BlueRidgeMark]

anything I should do to the soil?

Not as far as I know.