Beans and tomato plants both grow as vines. Pole beans require support from the outset to twine up as they grow. Tomatoes produce bushier vines and require support so the fruit doesn't sit on the ground where it is prone to rot, disease and insect infestation. Planting both beans and tomatoes in the same garden bed allows you to erect a single trellis for both plants. This saves space and requires fewer materials to build than erecting individual supports for each plant.
Pound a six-foot stake into the ground at either end of the planting row using a mallet. Pound the stakes one foot into the ground so they can support the weight of the plant.
Measure the distance between the two poles with a measuring tape. Add six inches to this measurement.
Cut a length of concrete reinforcing mesh to match that of your measurement using wire snips. Alternately, use chicken wire with one-inch holes.
Stretch the mesh between the two stakes. Staple the mesh to the stake every six inches using a staple gun. Alternately, attach it to the stakes with plastic zip-ties spaced every six inches.
Guide the young bean vines onto the mesh once they begin growing. They will twine up on their own afterward. Tie tomato vines to the mesh loosely with fabric plant ties as they grow, spacing the ties every four to six inches along the central vine.