Variety traits

Winter Hardiness — Cortaderia selloana (Schult. & Schult. f.) Asch. & Graebn.

Cortaderia selloana (Schult. & Schult. f.) Asch. & Graebn.

The crop is suitable for cultivation in USDA hardiness zones 7–11; however, the critical factor for survival is not only temperature but also soil drainage during the winter period.

In the reference 5 varieties crop Pampas grass, where this is mentioned in the description.

For Cortaderia selloana, winter hardiness is determined by its classification within USDA hardiness zones 7–11. Although some cultivated varieties, such as 'Andes Silver', 'Patagonia', and 'Pumila', demonstrate resistance down to zone 6, these data are not standardized agronomic indicators.

The primary cause of plant mortality during winter is soil waterlogging rather than exposure to low temperatures. To ensure successful overwintering, high-quality drainage must be provided; in regions colder than zone 7, it is necessary to cover the root system and tie the leaves together to protect the growth point from moisture.

The winter hardiness of Cortaderia affects the preservation of the plant's evergreen appearance. In warm climatic conditions, the aerial part persists, whereas in more severe regions it dies back, requiring mandatory spring pruning, or the plant is grown as a container crop overwintered indoors.

General information about the subject — on the page Winter hardiness.

Sources7

Varieties of Pampas grass mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.