The zucchini is a long, cylindrical vegetable, slightly smaller at the stem end, usually dark green in color. The flesh is a pale greenish-white and has a delicate, almost sweet flavor. Zucchini fruit grows quickly and is harvested within 2 to 7 days of flowering. Over-ripe zucchini and those past their prime can be bitter, but that didn’t stop a New York gardener from growing the world’s longest zucchini—a whopping 69 and a half inches!