tomato plants are dying

Question

Tomato plants are dying. They first wilt then just die. A person said it was the black walnut trees. The garden is an east-west garden with plenty of sun. We planted last year about 30 foot from where they are now. They grew fine.

Answer 1

While it might be the black walnuts, if you grew there before with no problems, the black walnut trees are likely not the problem.

Unfortunately though, it means that it is something else. It is likely a disease that is called wilt and it is incurable. This article has some other suggestions as to what it might be, but it sounds like wilt disease is the likely culprit.
https://www.gardeningknowhow.com/edible/vegetables/tomato/wilting-tomato-plants.htm