When the beans are mature, they will have a great mass of foliage, which is heavy, particularly when it is wet following rain. Therefore the supports need to be strong and firmly in place.
Wigwams are fun – but require a boy scouts’ knotting technique. Suttons sell a plastic ring which hold the canes firmly in place for just over £3.
Thompson & Morgan have a similar wig wam cane grip - about £5 for 2.
wigwan cane grip
Hazel poles make a strong support for runner beans and climbing french beans.
Hazel is said to be ’sustainable’. This is because it is a cut & come again plant – traditionally coppiced when the poles are a useful length & left to grow again.
The bean plants do not have to be tied to the pole. They find their own way to the pole and then twist themselves around it.