Known only in cultivation, Polianthes tuberosa has exceptionally sweet-smelling waxy white funnel-shaped 1 1/2 to 2 1/2" flowers that are borne on spikes that rise to 3' in late summer. It's superb for cut flower arrangements. Space 6-8" apart. Grows best in full sun and is hardy in zones 7-11. No serious disease or pest problems.