Any frames or trellis need to be sturdy enough to support these lanky beans, which grow to well in excess of 2m (6.5 feet) tall and which will become extremely heavy when laden with pods.

How big should runner beans be?

Runner beans are usually ready to harvest in July, when the pods reach about 20cm (8″) long. Avoid leaving the beans on the plant for too long or they’ll turn stringy. Ideally, you should pick beans every day or two to ensure optimum tenderness and remember, the more you pick, the more pods your plants will produce.

Will runner beans grow up trellis?

A Trellis Structure against a Wall: Runner beans with their vigorous climbing habit are perfect for small-space gardening. On a balcony, in a small courtyard or on the exterior of a house or block of flats without outside space, runner beans can be grown up a sturdy trellis affixed to a wall.