If you google various combinations of "vegetable companion chart
intercropping" you find many copies of a chart that comes up at the top
of the search anyway. There are definitely interactions between
veggies. This summer I could see that pole beans in one foot of
compost, near garlic, grew and produced only a half than those four
feet away, which had only a few inches of compost and acorn squash as
companion. But if you look at different tables, you find that cabbage
and tomatoes are listed as enemies in one, and companions in another. I
was also very frustrated to see very little .edu sites discussing the
matter. What is your experience? Are cabbage and tomatoes friends or
foes? What about the rest?