Vegetatively, mature jubatagrass tussocks are generally shorter and broader than the erect, fountain-like tussocks of pampasgrass. The plumes of jubatagrass are purple to tawny in color and are exserted to a greater height above the tussock than the creamy white plumes of female pampasgrass. However, male pampasgrass plants can have plumes that can be as long as jubatagrass, and more violet than female pampasgrass. Thus, they appear to be a cross between jubatagrass and female pampasgrass. These characteristics of the male plants have led some to incorrectly conclude that the two species hybridize.
Germination generally occurs in spring and requires sandy soils, ample moisture and light.
The temperature range is typical of coastal environments. After germination has occurred, initial growth is slow, but increases rapidly once seedlings become established. Seedling growth and establishment is most rapid on bare sandy soil and exposed road cuts, but requires cool foggy climate and moist soil. Jubatagrass seedling Seedling survival is low in shaded areas or in competition with grasses or sedges. Jubatagrass does not tolerate winter frost, warmer summer temperatures, more intense sunlight, and moderate drought.