Hellebore plants are among the earliest perennial flowers to bloom, welcoming spring with their rose-like blossoms. In warm locales, Helleborus orientalis can bloom outdoors at Christmastime. In colder zones, hellebores will break through the frozen ground early in the spring. Their foliage remains attractive into the summer, so they are suitable for splashy, mass plantings. They also complement foundation plantings and are ideal for woodland gardens.