Iris ‘Immortality’Every garden needs white Iris and this one is a re blooming Iris, blooming in spring and again in fall. Pure white with pale yellow beard. Is there anything more romantic! Immortality reaches 36 inches tall. Our Iris come potted, rooted in soil with green foliage. Iris reproduce by rhizome so will spread and can be divided every 3 5 years. Plant Rhizome just below the surface of the soil or at soil level, not too deep.