Helictotrichon sempervirens, commonly called blue oat grass, is a clump-forming, cool season, ornamental grass which typically grows 2-3' tall (foliage clump to 2' and flower stem brings the total height to 3') with a similar spread. Features very narrow (3/8" wide), spiky, steel blue leaf blades (to 18") which form a rounded, porcupine-like clump. Resembles blue fescue (Festuca glauca), but is significantly larger. Spikelets of bluish-brown flowers arranged in open, one-sided panicles arching at the tip appear on erect stems rising well above the foliage clump in June. Flower spikelets mature to a golden wheat color by fall.
| Requirement | |
|---|---|
| Hardiness | 4,5,6,7,8,9 |
| Heat Zones | 1,2,3,4,5,6,7,8,9 |
| Climate Zones | 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 |
| Plant Type | Ornamental Grasses |
| Plant Family | Poaceae |
| Exposure | Full Sun |
| Season of Interest | Spring, Summer, Fall, Winter, Early Spring, Mid Spring, Late Spring, Early Summer, Mid Summer, Late Summer |
| Height | 2' - 3' |
| Spread | 1' - 2' |
| Water Needs | Low |
| Maintenance | Low |
| Soil Type | Chalk, Clay, Loam, Sand |
| Characteristics | Deer Tolerant, Drought Tolerant, Rabbit Tolerant |
| Garden Styles | City and Courtyard, Coastal Garden, Gravel and Rock Garden, Informal and Cottage, Mediterranean Garden |
| Planting Place | Beds and Borders, Ground Covers |