There is no record of a vining zucchini. However, zucchinis may be classified according to "bush habit," whether open or closed.
Like other members of the summer squash group, the zucchini plant has the bush habit rather than the vining habit of the winter squashes. However, within the bush habit there is a fairly wide range of variations in general plant character, primarily in density and arrangement of leaves.
Varieties may be classified according to bush habit, with a rating of 1 given to the open habit, where the leaves are more sprawling and less cluttered, and a rating of 5 for the most dense habit of upright crowded leaves (closed). Five varieties rated in one test were : Burpee Hybrid (1.0), Blackini (2.0), Hyzelle (4.0), Hyzini (4.5), and Black Zucchini (5.0). Other varieties of the more open habit are Ambassador, Blackjack, El Dorado, Grey, Ball's Zucchini, and Caserta (semiopen).
