Cortaderia selloana, commonly known as Pampas Grass, is a tall grass native to southern South America, including the pampas after which it is named, and Patagonia. Pampas grass is a tall grass, growing in dense tussocks that can reach a height of 3 m (9.8 ft) . The leaves are evergreen, long and slender, 1–2 m (3.3 to 6.6 ft) long and 1 cm broad, and have very sharp edges (so they should be handled with care). The leaves are usually bluish-green, but can be silvery grey. The flowers are produced in a dense white panicle 20–40 cm (7.9 - 15.8 inches) long on a 2–3 m (6.6 - 9.8 ft) tall stem.
There are several cultivars available, including:
Pampas grass is highly adaptable and can grow in a wide range of environments and climates. It also seeds prolifically, with each plant able to produce over 1 million seeds during its lifetime. As such, in some areas (for example California, Hawaii or Green Spain) it is regarded as an invasive weed, whilst in New Zealand and South Africa the plant is banned from sale and propagation for the same reasons. Removal of Pampas grass by burning will not always prevent return. Chemical weed killer will kill the grass at the roots.