Lack of Pole bean production
Plant April 10 in northwest MS. 80% sunlight, high organic matter, ph 7.8 sidedressed with 8-24-24. Vines are covering 6 ft trellis. No insects present. Some bloom with very pod set.
Certified GKH Gardening Expert
Wow that pH is excessively high! This needs to be more like 6.5 to 7. The cause will be the high Phosphorus and Potassium side dressing, and will need to be offset with something acidic. This can be a myriad of things, including citric acid, sulfur, iron, or even iron sulfate. Just don't add anything with nitrogen to adjust the pH.
This article will give you more information on the care of beans: https://www.gardeningknowhow.com/edible/vegetables/beans/growing-pole-beans.htm