Hedychium gardnerianum aka Ginger Lily

Hedychium gardnerianum, also known as Kahili ginger, Kahila garland-lily, longose, or ginger lily, is a species of flowering plant in the ginger family Zingiberaceae. It is a tall, erect herbaceous perennial that can grow up to 8 feet tall and is native to the Himalayas in India, Nepal, and Bhutan. The plant has long, bright green leaves that clasp the tall stems. It spreads via rhizomes and forms colonies this way. The very fragrant flowers of Hedychium gardnerianum are pale yellow with long red stamens and are held in dense spikes above the foliage. They tend to appear in late summer or early fall, springing to life in large clusters. The yellow petals are thin and droop around the stamens. The plant is a late summer bloomer. Although the Kahili ginger is a delightful choice for a greenhouse or enclosed porch, it can be invasive in forest ecosystems in certain areas, including Australia, La Réunion, New Zealand, Portugal, Spain's Canary Islands, and South Africa. Dividing the plant in the spring can provide a way to create more plants and thicker growth. If the plant receives enough water, it should produce denser foliage.