Good morning MGs One of my hearty tomato plants started withering and is dying, just out of the clear blue. There are no insects nor anything diseased on the leaves. I looked it up and fear that black walnuts are the culprit. They are planted in a bed that is probably within 50 feet of a black walnut. The peas in the same bed also produced very little and barely grew. Who knew? Just wanted to tell you in case others may have a similar problem. Thanks! Rose