We have planted pole beans in our garden in the same location for the last two seasons. The first year they grew well, the second not so much. Is there a problem with planting pole beans in the same location. The supports are already there and I would rather use them again rather than move them, but I am concerned that maybe I am depleting the soil in that area by planting the same crop for a third season.
Recommendations are for a crop rotation every 3 years.
You can do a soil test to see if your soil needs amending this year prior to planting.
Seed source--did you purchase seeds from the same source or change variety?
Weather conditions and temperatures can also be attributed to change in crops.
Here are some links with more information.