Helictotrichon sempervirens
Helictotrichon sempervirens – Blue Oat Grass
Helictotrichon sempervirens – Blue Oat Grass
Exposure
- Sun
Rusticity
Bloom time
- June
- July
- August
- Radiant steel blue evergreen foliage
- Graphic and upright architectural silhouette
- Exceptional resistance to summer drought
- Low maintenance and trouble free
- Outstanding hardiness for cold winters
Wake up the visual texture of your garden landscapes with this ornamental grass featuring outstanding architectural elegance. It forms a graphic, mounded clump of rigid, bright steel-blue blades that maintain their distinctive metallic sheen all season long. Its spiky habit and fine texture bring fluid movement to the garden when caught by the wind, creating a striking contrast when paired alongside wider-leaved perennials.
Characteristics
- Foliage : Evergreen, long, and tapered leaves display an intense steel-blue coloration covered with a silvery bloom. This dense clump maintains its clean structure and distinctive colour even during the cold season.
- Blooms / Fruit / Stems : Slender, upright stems hold airy, straw-coloured flower panicles in mid-summer, rising gracefully above the mound of metallic foliage.
- Light : Position in full sun to intensify its blue colouration and guarantee a perfectly upright silhouette.
- Habit : Its bushy, compact, upright, and naturally well-branched silhouette maintains an impeccable and uniform structure without sagging.
- Growth : This perennial grows at a moderate pace, reaching its mature size within two to three seasons.
- Soil : Prefers loose, poor to moderately rich soil that offers absolutely impeccable drainage to prevent winter root rot.
- Temperature : It demonstrates exceptional hardiness, easily withstanding the rigours of zone 3.
- Resistance : It stands up superbly to summer drought, fungal diseases, and naturally deters white-tailed deer as well as hares and rabbits.
Use
- Types of use : Integrate it as a mass planting in rock gardens, structure contemporary borders along pathways, or plant it as a Thriller in a container on the terrace.
- Ornamental benefits : It delivers a massive visual impact thanks to its unique metallic hue and enhances garden structure throughout the winter months.
Maintenance
- Watering : Water moderately after planting to encourage establishment. Allow the soil to dry out completely between waterings once the plant is fully established.
- Fertilizing : Avoid excessive fertilizing, which weakens its upright habit. A simple application of light compost in early spring is more than sufficient.
- Pruning : Clean in spring by combing through or cutting back dry, winter-damaged foliage to stimulate the emergence of fresh blue growth.
- Planting : Install plants in spring into well-warmed soil while maintaining adequate spacing to allow for natural spread.
Plant details
Dimensions
Dimensions
Characteristics
Characteristics
Habit:
- Bushy
- Upright
- Rounded
Flowering colours:
- Brown
- Yellow
Plant needs
Plant needs
Watering:
- Tolerates dry and well-drained soil
- Moderate
Maintenance:
- Easy
- Clean in spring
Soil requirement:
- Well-drained
- Loose
- Adaptable
Features
Features
Resistance:
- White-tailed deer
- Hare and rabbit
- Heat
- Cold
- Drought
- Disease
Attract:
- Birds
Use:
- Border
- Mass planting
- Flower bed
- Rock garden
- Container
- In-ground
- Thriller
Attribute:
- Small landscaping and garden
- Flexible use
- Evergreen foliage

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