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Koeleria glauca

Grey-Blue Koeleria

Low Maintenance Hardiness H5

Fine blue-grey foliage forms compact tufts on Koeleria glauca, topped by narrow silvery flower heads in early summer. This small ornamental grass is ideal for rockeries, gravel gardens and sunny border edges, thriving in poor, dry soil with excellent drainage.
SKU: KOEL-6-Y
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Plant Details

Flowering Months

January, not a flowering month
February, not a flowering month
March, not a flowering month
April, not a flowering month
May, not a flowering month
June, flowering month
July, flowering month
August, not a flowering month
September, not a flowering month
October, not a flowering month
November, not a flowering month
December, not a flowering month

Size

Max Height
0.1 m — 0.5 m
Max Spread
0.1 m — 0.5 m
Growth Habit
Forms dense upright tufts or clusters of leaves and stems.

Planting Position

Sunlight Indicates how much direct sunlight the plant needs each day. Full sun means 6+ hours, part shade is filtered or morning sun, and full shade is little to no direct sun.
Full Sun Part Shade
Aspect Aspect refers to the direction the planting spot faces (north, south, east or west). It affects light levels, warmth and exposure.
North South East West
Exposure Exposure describes how sheltered or exposed a plant’s position is, particularly to wind and weather.
Exposed / Sheltered
Hardiness Hardiness indicates how well a plant tolerates cold conditions outdoors. Higher ratings generally mean greater frost tolerance.
Hardiness H5 (−15 to −10 °C) Cold-hardy

Ideal Soil Conditions

Soil Type Soil type describes the texture of the soil (clay, sand, loam, chalk). This affects drainage, nutrients and how roots grow.
Chalk Clay Loam Sand
Soil Moisture Soil moisture tells you how wet or dry the soil should be for best growth. Match this to your garden conditions for healthier plants.
Moist but permeable / Free draining
Soil pH Soil pH measures how acidic or alkaline the soil is. It affects nutrient availability and can impact plant growth.
Alkaline Neutral

Plant Uses & Merits

Uses
  • Patios / Courtyards
  • Rockeries
  • Containers
  • Flower Borders
Merits
  • Generally disease-free
  • Generally pest-free
  • Low Maintenance

Koeleria glauca Description

Koeleria glauca, commonly called blue hair grass, is a compact evergreen or semi-evergreen ornamental grass forming neat tufts of narrow blue-grey leaves. Slender stems carry pale silvery-green flower panicles in late spring and early summer, adding light movement without overwhelming nearby plants. Mature clumps generally reach around 30 to 45cm high in flower and remain relatively narrow. Grow in full sun in poor to moderately fertile, freely draining soil. It performs particularly well in gravel gardens, rockeries, troughs and dry border fronts where richer, moisture-loving grasses may struggle. It is hardy and drought tolerant once established. Avoid heavy, persistently wet ground, especially through winter. Comb or trim away dead foliage in spring to refresh the clump.

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