Summer Bush. Round zucchini, or globe zucchini, is a distinctive summer squash with a smooth, dark green, spherical shape. Best harvested at 3–4 inches in diameter, the fruits offer a tender texture and mildly sweet flavor. Perfect for stuffing, grilling, roasting, or stir-fries, they’re a versatile kitchen favorite. The compact, bushy plants thrive in full sun and well-drained soil, making them great for small spaces. Heavy producers, they deliver a generous harvest all season long.