Answer: To be honest, healthy zucchini plants are just plain big. Unfortunately, they do not lend themselves to pruning. To conserve space you might want to pull out one or two of your plants and make do with the harvest from the remainder. Many gardeners find themselves swamped with zucchini in next to no time, so you might also want to consider picking the fruit while it is still small and tender, too.
For next year's garden you might want to allow more space for these plants. In my experience, three or four feet apart is not too much, even for the "compact" types. In the meantime, enjoy the crop!
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