Summer squash

Summer squash is not one botanical species or a crop with one simple birthplace. It is a culinary group of squashes harvested before maturity, when their skins remain soft and their seeds are undeveloped. Most common types—including zucchini, yellow straightneck, crookneck, and pattypan—belong to Cucurbita pepo, though other Cucurbita species can also be eaten young.

The deeper story begins in the Americas. Wild ancestors of C. pepo grew in parts of Mesoamerica and what is now the United States, and researchers recognize distinct domesticated lineages associated with those regions. Indigenous peoples selected gourds over thousands of years, initially valuing durable fruits and nutritious seeds as well as flesh. Squash became an important crop in farming traditions across North America.

After European contact, American squashes crossed the Atlantic and entered gardens and cuisines throughout Europe, the Mediterranean, and beyond. Zucchini—the best-known summer squash today—was developed in Italy from American C. pepo stock and later carried to the United States by immigrants. Its Italian identity reflects the development of the modern cultivar, not the native range of the species.

Today, summer squash is grown widely in warm seasons and under irrigation where needed. California, Florida, Georgia, Michigan, North Carolina, and New York are among the notable U.S. producing areas, while Mexico is an important supplier. The crop’s modern diversity joins ancient American domestication with centuries of regional selection and culinary preference.