Mature plants are absolutely stunning plants! Large plants 2-3 m (6-9ft) tall with very ornamental silky pink plumes appear inlate summer. This native ofArgentina isa tender perennial that is reliably hardy inZone 6b and up. In Zones 5 and colder, it will have to be potted up and brought indoors in order to survive the winter. The seed is very slow to germinate and it can take 3 to 4 years for the plant to reach its full size.