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All are summer squash. TheAll are summer squash. The yellow squash that looks similar to the green zucchini is called straightneck squash. They're both quick-growing. I think my yellow summer squash variety was 50 to 60 days to maturity and the zucchini was 50 to 60 days, but it completely depends on your seed variety so just check the back of the seed packet or look at the seed retailers online to get a sense of the "days to maturity."

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