Q.Running butter beans
What fertilizer should I be using to grown butter beans. For the last two years I have had all bush and very little beans that ever matured. We keep our garden watered and everything else did fine.
All plant and no beans could indicate an excess of Nitrogen in the soil.
I would suggest a soil test to determine your soil content.
These links have more information.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/too-much-nitrogen-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/edible/vegetables/beans/growing-butter-beans-in-your-garden.htm