Answer: Are you planning to grow the plants to maturity in the greenhouse? If so, then I would think any type would do, depending on the space you have and your preferences. Indeterminate types grow into long vines, so you would need to be able to train them to a post or trellis. Determinates grow more like bushes.
Though some plants can be started in early to mid summer for a fall crop, I wouldn't count tomatoes and peppers among them. These are heat-loving, long season plants and thrive in summer weather. Good fall crops include the brassicas (broccoli, cauliflower, etc.), spinach, and lettuce.
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