Should excess growth be pruned from pole beans? If so, when, how much and how often?
Pruning Pole Beans
Certified GKH Gardening Expert
Frankly, I would just leave them be. They will eventually twine around other parts of the plant or you can even help get them started. While trimming may stunt growth, it could encourage other problems, such as disease. They're only going to grow so much anyway.