I had one row of string beans last year with poles so that they could climb. What I learned is that the roots produce beans, too! The following year those beans produce plants and kill everything else.
Whoa! I didn’t know the roots produce beans too! I only tried the one year and it was a bit of a bust. The three things that did great were the beans, watermelons (40-pounders), and cantaloupes (12 to 14 pounders). I planted corn, tomatoes, sweet peas, and potatoes, too, but they didn’t fare well. We had a VERY wet summer that year and it was too much for them I reckon.
The area where the garden was was allowed to grow over with grass again and since Hubby keeps it mowed, any beans that tried to grow from the roots didn’t stand a chance.