All I had to do was make a framework for the strings. I had cabinet-maker's skills, and I had my own ideas, so I designed a tomato trellis. I wanted a stable, freestanding structure that could be taken apart at the end of the growing season and stored in a minimum amount of space. To get the most from trellised tomatoes, use vining tomatoes rather than bush types or dwarfs. Vining tomatoes are also called indeterminate tomatoes, as opposed to determinate ones.
Determinate tomatoes tend to reach a determined size and then stop.
Their fruit ripens all at once. Some well-known determinate tomatoes are 'Bush Beefsteak' and 'Bush Early Girl'. Indeterminate tomatoes are vigorous and will keep growing until they are frozen. They have more foliage, and this may result in tastier fruit. Once the first fruits ripen, the plants continue producing until frost.