Large Juniper Trees. Juniperus virginiana, or the eastern red cedar, is a tall, attractive juniper tree that grows to heights of 50 feet or more. It is hardy in USDA zones 2 through 9 and has a moderate growth rate. Juniperus scopulorum Skyrocket is one of the narrowest junipers available.mall Juniper Trees. Juniperus chinensis Blue Vase has a moderate growth rate and will reach maximum heights of about 10 feet if properly cared for, with widths of half the height. On average, however, it grows to about 5 feet tall.