I grew them last year for the first time and they were hardy long-lasting plants. They were planted in a greenhouse/polytunnel and they only suffered from some black bean aphids in spite of not treating them at all.

I add the Thompson and Morgan description as it was the one that persuaded me to purchase them: Delicious bunches of stringless, purple, round fleshy pods up to 27cm (11in) in length over a long harvest period. Climbing Bean Blauhilde is attractive in vegetable and flower gardens, especially if mixed with yellow or Borlotto beans, or Sweet Peas. Common Bean Mosaic Virus resistant. Ornamental for both flower and vegetable gardens, prefers well drained, moist, rich soil in a sunny situation.