Koeleria glauca
Koeleria glauca · Poaceae
📷 Le.Loup.Gris · CC BY-SA 3.0
The gardener's calendar
Ideal time to plant koeleria glauca: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Persistent, finely textured
- Flowering
- May to June, discreet golden spikelets
- Mature size
- 30–40 cm in height
- Growth
- Slow to moderate
- Hardiness
- Very hardy (down to −20 °C)
- Origin
- Temperate and mountainous regions of Europe
- Soil type
- Well-drained, chalky, poor to moderately fertile
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Plant in well-draining soil, preferably limestone-rich. No watering or feeding once established.
The common mistake
People think it's delicate and try to 'coddle' it with water and compost, which makes it soft and leaves it vulnerable to rot.
The pro's trick
Sow it in a nursery bed and transplant it young (small pots): it recovers much better than if you buy a large containerized plant.
Care
Watering
Glaucous fescue tolerates drought very well once established. During the first year, water moderately during dry periods to encourage root development. After that, natural rainfall is usually sufficient, except in very arid climates or when grown in containers.
Light exposure
Plant this grass in full sun, with a minimum of 6 hours of direct sunlight daily. It copes less well with partial shade, where it becomes less dense and loses its characteristic glaucous tint.
Soil and drainage
Well-drained soil is essential: it fears waterlogged conditions. It prefers chalky, rocky, or poor terrain. Avoid compact clay soils or overly rich soils that encourage weakening growth.
Pruning and maintenance
In late winter or early spring, cut back the dried foliage to 5–10 cm from the ground to make room for new growth. Once established, this grass requires minimal pruning, its habit remaining naturally compact and tidy.
Fertilizing
No fertilizer is necessary: glaucous fescue prefers poor soils. Excess nutrients weaken the plant and reduce its hardiness.
Diseases and pests
Very resistant, it suffers from no common diseases if drainage is good. Excessive moisture can promote root rot; this is its only major weakness.
Did you know?
Glaucous fescue takes its scientific name from German botanist Georg Ludwig Koeler. This small grass is highly valued in minimalist landscape design and gravel gardens, as it tolerates extreme conditions and offers understated elegance with its powdery blue-grey tint, particularly striking in spring during flowering.
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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- Common quaking grassBriza media
- Creeping soft-grassHolcus mollis
Tips generated and checked by Viridia — adapt them to your local climate.