Common garden hops (Humulus lupulus) can grow 20 feet or taller, producing lush green vines later covered in creamy cone-like flowers. These cones are a key ingredient in beer brewing, making hops an ornamental choice that also useful for the home brewer. The vines grow quickly, so they also can provide shade and privacy in the garden. Hops thrive in U.S. Department of Agriculture plant hardiness zones 4 through 8 when grown correctly and given proper care.