I live in zone 4b and they need every day to ripen - most don’t by the end of September. I start the seeds indoors in flats and transplant. Moral: they need a long growing season.
FWIW, this is one failing of Baker Creek. They do not provide adequate information on all their offerings. One variety gives days to maturity, another doesn’t. Same for descriptions. He’s young, though, and I think he’ll get better. He certainly is crazy about getting seeds into the country, too, and that’s a good thing.