Poa costiniana, commonly known as Bog Snow-Grass, is a deciduous perennial grass native to subalpine grasslands, alpine meadows, and bogs in Eastern Australia and Tasmania. This species is adapted to cold, wet environments and often occurs in areas that are seasonally snow-covered. It typically grows to a height and width of 1-2 feet (0.3-0.6 meters), forming dense tussocks of fine-textured, blue-green foliage. The inflorescences are open and airy, with a silvery-green color that can add a delicate texture to garden plantings.

Bog Snow-Grass is valued for its ability to thrive in moist, cool conditions, making it an excellent choice for water gardens, bog gardens, and as a ground cover in damp, shaded areas. It is also used for revegetation projects in its native range due to its tolerance of harsh alpine conditions. In cultivation, it requires consistent moisture and can grow in full sun to full shade, making it versatile for various garden settings. It prefers soils with medium drainage and can tolerate poor fertility. While it is generally low-maintenance, it can be susceptible to rust diseases in warm, humid climates.CC BY-SA 4.0