Locate a warm, well-ventilated and protected area to hang the fishing line. You will need two opposing walls or posts.
Measure the fishing line to reach from each side of the wall or post. Add extra line to the measurement to compensate for tying.
Hammer the nails into the wall or posts. Knot the fishing line around the nail. Repeat on the other end. Be sure the fishing line is taut enough to hold the beanstalks.
Cut or pull plants near the soil.
Cut additional fishing line to tie around the base of the plant. Tie the beanstalks to the line between the walls or post.
Allow the beans to air-dry until the pods are brown. When you shake the pods, the beans should rattle inside. This means the means are ready to be removed from the pods.