Phyllostachys nigra var. henonis, commonly known as Henon Bamboo or Giant Gray Bamboo, is an evergreen grass native to the forested mountain slopes and riverbanks of China. It exhibits a rapid growth rate, reaching heights of 30-50 feet (9-15 meters) and a spread of 5-10 feet (1.5-3 meters). This bamboo variety is characterized by its elegant, upright canes that start green and age to a soft gray color, providing a striking visual contrast in the garden. The foliage is lush and evergreen, offering year-round interest. Henon Bamboo flowers are rare and not particularly showy, as bamboo species often flower infrequently.

Henon Bamboo is valued for its fast growth and the visual impact of its tall, graceful canes. It is commonly used as a privacy screen, windbreak, or ornamental feature in larger landscapes. While it thrives in full sun to part shade, it is adaptable to a range of soil types, including clay, loam, or sandy soils, provided they have medium drainage. Regular watering is necessary to keep the plant healthy, especially during dry periods. Gardeners should be aware that bamboo can be invasive due to its spreading rhizomes; containment measures such as rhizome barriers are recommended.CC BY-SA 4.0