Start with sturdy stakes at least 6 to 7 feet tall.
Place a stake between each plant and drive it 12 inches in the ground. If you put a stake between every two to three plants, drive it 18 inches in the ground
Use a durable, weather-resistant twine that doesn’t stretch too much, like tomato twine (a 3-ply jute works well) or synthetic baler twine.
Starting about 8 inches above the ground, loop a length of twine around the first stake and weave the twine in and out between each plant.
When you reach the last stake, loop the twine around the stake in a figure-8, making sure the twine grips the stake and the line is taut, but not pulling too tightly to damage your tomato stems.