Blue Oat Grass
Helictotrichon sempervirens
Grasses & Groundcovers Difficulty: Easy
📖 About this plant
An elegant, evergreen ornamental grass with narrow, steel-blue foliage that forms a neat, rounded tussock. In summer, it sends up tall, graceful flower spikes with oat-like panicles that sway beautifully in the breeze. A reliable, cold-hardy, and drought-tolerant grass that provides year-round color and structure to the landscape.
🧑🌾 Care requirements
☀️
Light
Full sun (6+ hrs)
💧
Water
Every 1-2 weeks
💨
Humidity
Low (30-40%)
🌡️
Temperature
5-30°C
🪴
Soil
Well-draining, average to sandy soil; tolerates poor, dry, rocky soils; avoid wet heavy clay
🧪
Fertilizer
Minimal — a light dressing of compost or balanced fertilizer in early spring
📋 Plant facts
- 🌍 Origin
- Central and southwestern Europe, including the Alps and Mediterranean regions
- 📏 Max height
- 45-75 cm
- 📐 Spread
- 30-45 cm
- 🕰️ Bloom time
- Summer
- 🎨 Bloom color
- Tan to pale yellow, borne on tall narrow panicles in early to mid-summer
- 🍃 Foliage color
- Blue-Green
- ⏳ Lifespan
- Perennial
- 📈 Growth rate
- Slow
- ☠️ Toxicity
- Non-toxic to humans and pets
- 🌱 Propagation
- Division of clumps in early spring or early autumn; seed sowing in spring
🛡️ Health & Safety
🐾 Pet safe
✅ Non-toxic
Non-toxic to humans and pets
Common issues
- Rust fungus, Crown rot in wet soil, Center dieback needing division, Leaf spot
💡 Care tips
- Steel-blue spiky foliage forms a neat rounded mound,Extremely drought-tolerant and thrives in poor rocky soil,Produces narrow tan flower spikes above the foliage in summer,Excellent choice for xeriscaping and low-water gardens
🪴 Add to My Plants
One click — added instantly. Watering every 11 days, fertilizing every 30 days.
