Summer squash refers to a diverse group of tender, warm-season squash harvested while immature, when the skin is thin, the seeds are soft, and the flesh is mild and delicate. Unlike winter squash, which develops a hard rind and is stored for months after ripening, summer squash is enjoyed fresh throughout the growing season. Common varieties include green zucchini, yellow zucchini, yellow straightneck squash, crookneck squash, patty pan squash, cousa squash, and round zucchini.

Although they vary in shape, color, and texture, all summer squash belong to the species Cucurbita pepo and share a similar nutritional profile. They are naturally low in calories, rich in water, and provide vitamin C, potassium, vitamin B6, fiber, lutein, zeaxanthin, and a variety of other beneficial phytonutrients. Their mild flavor makes them one of the most versatile vegetables in the kitchen, lending themselves to everything from fresh salads and quick sautés to soups, casseroles, baked goods, and grilled dishes.