Protected Series:
Zone: 3
BLUE OAT GRASS
Helictotrichon sempervirens, commonly known as Blue Oat Grass, is a classic cool-season ornamental grass celebrated for its refined, architectural silhouette and steely-blue color. It forms a dense, porcupine-like mound of stiff, semi-evergreen blades that typically reaches about 2 feet tall and wide. In early to mid-summer, it sends up elegant, arching stems topped with airy, oat-like flower spikes that emerge with a blue-green tint and mature into a shimmering translucent tan. Because of its perfectly symmetrical "fountain" shape and metallic hue, it is a staple in Mediterranean gardens, rockeries, and modern landscapes where a clean, structural element is needed.
Caring for Blue Oat Grass is straightforward, provided it is planted in a spot that mimics its native alpine habitat. it thrives in full sun and requires well-drained soil to prevent crown rot; it is particularly sensitive to "wet feet" during the winter months. Once established, it is remarkably drought-tolerant and deer-resistant, making it an excellent choice for low-maintenance or xeriscaped beds. Because it is semi-evergreen, you should avoid cutting the entire plant back to the ground; instead, simply "comb" through the mound in early spring with gloved hands or a small rake to remove old, brown blades and refresh the plant for new growth.
| PLANT | SIZE | TYPE | GALENA | ADD'L | DIG | SOON |
| HELICTOTRICHON SEMPERVIRENS | con 1 | 89 | 0 | 0 | 0 | |
| HELICTOTRICHON SEMPERVIRENS | TRADE 1 | 4 | 0 | 0 | 0 |
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To help this plant settle in and thrive, we recommend these standard planting practices: Plant in well-draining soil with a slightly acidic pH. Water regularly, but avoid overwatering. Prune back after blooming to encourage new growth. Fertilize lightly during the growing season.
Available cultivars in this genus:
