Measure the space you want the trellis to take up. Write down height and width measurements.
Purchase a panel of heavy-gauge wire or livestock panel for a heavy-duty trellis. Purchase a steel T-post for every 4 to 6 feet of paneling you'll need.
Dig a hole in the ground about 2 feet deep. Insert a T-post and back-fill the hole, compacting the soil well for a secure support.
Measure 4 to 6 feet from that post, or to where you want the trellis to end, if the space measures less than 4 feet. Dig another hole and insert another T-post as before. Repeat this step until you have T-posts to support the entire length of your trleis.
Unroll and attach the wire or livestock panel using scraps of heavy-gauge wire and wrapping several of them around each post and the paneling. Use needle-nose pliers or crimpers to twist and secure the scraps.
Tie your cherry tomato plants to the trellis as they grow, using soft cotton or old T-shirts to avoid injury. Weave the plants through the paneling for best support.