How to plant and support runner bean plants. Pea and bean plants are climbing plants and need supports as they grow, here Andrew demonstrates how to build a wigwam support structure using bamboo canes. Bamboo canes, like willow rods, are an inexpensive and easy way of building garden structures of any size. Plant runner beans in a sheltered spot to encourage pollinating insects. They grow well in partial shade. Supports of 2.2metres should be put in place before transplanting your seedlings.