Nassella gigantea, commonly known as Giant Feather Grass, is an evergreen perennial grass native to the grasslands and open woodlands of Southern South America. It reaches a typical height of 4-6 feet (1.2-1.8 meters) and a width of 2 feet (0.6 meters). This species is characterized by its tall, arching, feathery inflorescences that sway gracefully in the breeze, adding texture and movement to the garden. The flowers emerge green but mature to a golden hue, providing visual interest from late spring into autumn.

Giant Feather Grass is valued for its low maintenance requirements and its ability to add a naturalistic, meadow-like quality to landscapes. It is often used in ornamental grass borders, as an accent plant in mixed borders, or for erosion control on slopes. This grass prefers full sun exposure and can tolerate a range of soil types, provided they have good drainage. While it is drought-tolerant once established, it benefits from medium amounts of water during its growing season. Gardeners should be aware that in some regions, Nassella gigantea can self-seed and become invasive, so it is important to monitor and manage its spread to prevent unwanted naturalization.CC BY-SA 4.0