Grapes grow on woody perennial vines that can be trained to many decorative forms. The vines need full sun to provide the heat required to ripen the fruit. Flowers and fruit develop on new shoots called canes. Grapes are pollinated by wind and insects. The root system needs to grow and be watered regularly throughout the first year. Grapevines can be grown in USDA hardiness zones 4 to 10. The underground part of the grapevine consists of an underground trunk with the root system, while the above-ground part consists of the trunk, canes, and shoots. On the one-year-old shoots, there are leaves, tendrils, flowers, and grapes. Grapes need about 50 to 100 square feet per vine if growing vertically on a trellis or arbor. Vine spacing within the row can be 6 to 9 ft. apart.