Bristle bent
Alpagrostis setacea · Poaceae
The gardener's calendar
Ideal time to plant bristle bent: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Poaceae (grasses)
- Type
- Ornamental perennial grass
- Foliage
- Persistent, fine and silky
- Flowering
- July to September
- Adult size
- 30 to 60 cm in height
- Hardiness
- Very hardy (down to -20°C)
- Origin
- Alps and mountainous regions of Europe
- Growth
- Moderate to fast
Care
Exposure
Alpagrostis setacea prefers a sunny to partially shaded position for optimal development. It tolerates windy and exposed situations well, typical of alpine zones. Avoid dense shade which would slow growth and affect its form.
Soil and planting
This grass adapts well to poor, well-drained and even rocky soils, characteristic of its natural mountainous habitat. Avoid heavy and poorly drained soils that promote root rot. Adding sand or gravel improves drainage in clay soils.
Watering
After planting, keep the soil slightly moist during the first season. Once established, Alpagrostis setacea is very water-efficient and tolerates drought well. Water moderately during prolonged dry spells, particularly for container-grown plants.
Pruning and cleaning
Cut back the clump to ground level in late winter or early spring before regrowth. Remove faded flower spikes if you wish to encourage foliage density. A light combing in spring removes dead leaves.
Fertilizing
Alpagrostis setacea is undemanding and requires only light fertilizing. A balanced application in spring is ample; in poor soils, diluted organic fertilizer can be beneficial. Avoid excess which would promote soft foliage and loss of form.
Diseases and pests
This alpine grass is very resistant to diseases and pests. Rot occurs only with chronic waterlogging or poor drainage. Inspect regularly in wet soil to prevent any risk of root rot.
Did you know?
Alpagrostis setacea, also called bristle bent-grass, is a pioneer grass characteristic of high-altitude alpine meadows. Its name 'setacea' means 'silky in form,' referring to its fine delicate leaves that sway gracefully in mountain winds. Historically, it played a key ecological role in stabilizing eroded soils on alpine slopes.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
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- Reed canary-grassPhalaris arundinacea
- Common quaking grassBriza media
- Creeping soft-grassHolcus mollis
Tips generated and checked by Viridia — adapt them to your local climate.