Not sure what type of beans or what areas that would be? What group beans are you talking about planting and what areas?
In my area that would not be possible. The group beans we plant. Group 3's to group 8's. Grow and mature by the days length.
Meaning? In our are we could plant 1 month earlier or one month later and the beans would be ready to pick within maybe a week difference.
Because they will not be ready untill the day length shortens enought.
BUT! We can plant group 1 or 2 and harvest in august. That would also be the same way. They are ready in august basicly no matter when you plant. But I am talking east coast and south east. But that is a completely different type of bean. Not sure about the mid west and other areas. I believe they will always plant an earlier group bean?