Answer: There are two types of tomato plants on the market; determinate and indeterminate. Determinate plants are small and bushy and produce a single large crop. Indeterminate tomato plants continue to grow and produce fruit all summer long. If space is a problem plant determinate types next year. Your indeterminate plants will probably grow 5-6' tall and maybe even as wide. I use 6' tall cedar stakes (2-3 per plant) and run string between them to provide a bit of a netted area on which to train the stems. With a little tying, you can keep the entire plant upright. Just for reference, many commercial growers simply allow the plants to sprawl on the ground. This makes the fruits easy targets for slugs and snails, the the fruit can get dirty, but it saves having to stake and tie the plants upright.
Best wishes with your tomatoes!
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