Need help with tomato plant and herbs turning brown in the middle.

[jillan]

It's happening on my oregano and one of my tomato plants.

The main branch turns brown and the leaves/growth coming from the middle of the plant is drying out.
Yet the outer leaves are fine.

I once had this happen to some herbs I was growing in a container and they all finally died :(

Anyone know what causes this? I don't want to lose these plants.

[Gormy Cuss]

1. It would help if you could post a picture or two.

"leaves/growth coming from the middle of the plant" do you mean new suckers/shoots, or sections of existing branches with healthy looking leaves at the ends?

Look at this Iowa guide -- it has plenty of pictures. Maybe you'll see something similar.
http://www.extension.iastate.edu/Publications/PM1266.pdf

[jillan]

2. Thanks - it's either blight or spider mites.

Tomorrow I will have to pull some leaves off and study them more.

Your link lead me to this
http://aggie-horticulture.tamu.edu/tomatoproblemsolver/index.html

Both are worth bookmarking.