Pole beans are nice for small space gardeners due to their climbing nature, they will only effectively upwards. Rather then poles use plastic bean trellis or string. 6 feet of climbing space should be ample. You should expect a abundant harvest. Remember as the beans grow and fill out they will cast a shadow. Place them in an area of the garden that won’t block out light from other plants requiring it. If fertilization is required wait until the plant is established as it could be harmed otherwise.