Hedychium spicatum - 2Ltr is unavailable at this time.
Please try searching as it may be available at a different size/price.
Picture by peganum from Small Dole, England (Hedychium spicatum) [CC BY-SA 2.0], via Wikimedia Commons
Originating from Himalayas, China
From fairly high altitudes in the Himalayas it has largish white flowers, delicately scented, with a prominent lip and red to orange blotches at the base.
Grow in fertile, moist but well-drained soil in sun/part shade.
Eventual mature plant size :