Very Prolific, Tasty, Early
This is a keeper! It would be my first choice if I could have only one yellow bean. They are early, and provide two full flushes of beans. There may be time for a second planting even before the first is finished on the same tower. For variety I also like the curved yellow Anellino, and it's excellent, but much later maturing. There's time for planting them once, but they are prolific when they get going. By the end of summer they are a nice change of pace.