24-36" tall. Double Tuberose (Polianthes) is a double-flowered cultivar, also known as The Pearl, and has fragrant, creamy-white flowers on tall stems above clumps of grass-like foliage. Double Tuberose is a wonderful cut flower for long-lasting flower arrangements. Perfect for patio pots. Plant in well-drained soil in full sun in spring once soil temperatures reach 60 degrees Fahrenheit and all danger of frost has passed. Cold hardy in zones 7-10; grow as an annual in colder zones. Continue planting every two weeks through the end of July to extend blooming throughout summer.