How to Prune Aztec bean?
No pruning required

Aztec bean · Phaseolus coccineus
Also known as: butterfly runner; Dutch case-knife bean; fire bean; multiflora bean; runner bean; scarlet runner bean; scarlet runner
Grow up support in moisture-retentive soil which is close to a neutral pH, in full sun. For more advice see runner-bean cultivation
No pruning required