Grey-blue koeleria Koeleria glauca 5-10 pot P9

Size: Potmaat leidend

5-10cm

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Pot 9x9 cm (P9)

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Available from: 03/02/2025

Number of m2

Nr. of plants

3.00

3.00 per piece

incl. VAT, excl. shipping costs (calculated in shopping cart)

Added to shopping cart

Number of m2

Nr. of plants

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Bulk discount!

Pcs Save Price/pc

2+ £3.35

6+ -3.0% £3.25

12+ -6.0% £3.15

24+ -7.5% £3.10

96+ -10.4% £3.00

Benefits according to our specialist

Plantable year-round
Low maintenance
Decorative foliage

Plant features
Description
Planting and care
Packaging and shipping

Genus
Koeleria (view all varieties)

Root type
Pot

Pot size
9x9 cm (P9)

Flowering months
May, June, July, August

Leaf colour
Brown, Yellow

Possibilities
Border, Group planting, Planter, Pot, Edge planting

Soil type
All soil types, well-drained

Positioning
Semi-shade, Sun

Winter hardiness
-15,0°C / -9,4°C, USDA zone 7b/8a

Fruit-bearing plants
No

Water needs
Average water

Number of plants per m²
9

Evergreen plants
No

Leaf colour
Blue, Green

Fragrant plants
No

Growth habit
Clump-forming growth habit

Height at time of delivery excluding pot/clod
5-10

Mature height (cm)
40

Art. no.
1000678

Description

Koeleria glauca | Grey-blue koeleria

The enchanting grey-blue Koeleria, commonly known as glaucous hairgrass, is a picturesque perennial that brings a touch of the European and Central Asian wild meadows to your garden. With its distinctive silver-green foliage, Koeleria glauca is a favourite among gardeners seeking to add texture and movement to their landscapes. This grass's unique color palette and clump-forming growth make it a versatile addition to any border, group planting, or container.

Key Features

Koeleria glauca thrives in a range of soil types, provided they are well-drained, and can flourish in both sun and partial shade.
This species is known for its striking foliage, displaying hues of green, grey, and silver throughout the seasons.
With an ultimate height of 40 cm, Koeleria is an ideal choice for edge plantings, offering a soft, yet structured appearance.
The plant's subtle brown and yellow flowers bloom from late spring to late summer, adding a delicate contrast to the vivid foliage.
While not evergreen, Koeleria glauca is considered semi-evergreen, maintaining much of its foliage year-round in milder climates.

Tips

For best results, plant Koeleria glauca in a location that receives ample sunlight to encourage the fullest expression of its grey-blue foliage.
Keep the soil consistently moist, but be wary of overwatering to avoid root rot, as this species does not tolerate drought conditions well.
To propagate, consider dividing the plant in spring or autumn. This will not only yield new plants but also rejuvenate the parent clump for continued health and vitality.
Annual division is also a good maintenance practice to ensure that your Koeleria glauca retains its compact form and does not become overly dense.
Although it requires average water, during extended dry periods, ensure that Koeleria glauca receives additional water to sustain its lush appearance.

Ideal placement of a Koeleria glauca

Thriving best in full sun to partial shade, Koeleria glauca requires a location where it can bask in ample sunlight for the majority of the day. This exposure ensures the plant's characteristic blue-green and silvery foliage maintains its vibrancy. Adaptable to various soil types, it is essential that the chosen site provides well-drained conditions to prevent waterlogging, which this species does not tolerate well. An average water need means that while the plant can withstand typical garden conditions, it should not be subjected to extended periods of drought.

How do I plant a Koeleria glauca?

When planting Koeleria glauca, it is best suited to a location with full sun to partial shade and thrives in a range of well-drained soils. As a semi-evergreen, its striking foliage retains color from spring through winter, providing year-round interest. Planting can occur at any time during the growing season, avoiding periods of frost. The clump-forming grass should be given enough space to spread, enhancing its natural, tufted appearance. Regular watering is necessary, especially during dry spells, to ensure the plant establishes itself and maintains its ornate display of foliage and subtle flower hues.

Pruning a Koeleria glauca

To maintain the compact and neat appearance of Koeleria glauca, it is advisable to cut back the foliage in late winter or early spring before new growth begins. This process will invigorate the plant, encouraging fresh, vibrant growth that showcases the characteristic silver-green leaves. Pruning is simple: just trim the plant down to the ground, as this species recovers well and will quickly regenerate. Regular trimming also helps prevent the center of the clump from dying out, ensuring a fuller, healthier appearance throughout the growing season.

Watering a Koeleria glauca

Ensuring a consistent moisture level is key to maintaining the vitality of Koeleria glauca. While the plant has an average water need, it is not drought-tolerant, and its water requirements should be carefully observed, particularly during dry spells. A well-drained soil will prevent waterlogging and promote healthy growth. During the growing season, be attentive to the soil's moisture and water when the top inch feels dry to the touch. Regular watering will support the clump-forming growth habit and contribute to the lush, blue-green foliage that characterizes this ornamental grass.

Fertilising a Koeleria glauca

To optimize the vitality and aesthetic appeal of Koeleria glauca, an appropriate fertilization regimen is essential. It thrives best when provided with a balanced fertilizer in early spring, as new growth emerges. This initial feeding should be followed by a second application just before the commencement of the flowering period, typically in late spring. The clump-forming growth habit of this species benefits from the gradual release of nutrients that support both foliage and flower development.

While Koeleria glauca is undemanding and adaptable to various soil types, ensuring well-drained conditions and even moisture levels will further enhance its performance. Care should be taken to apply fertilizer evenly around the base of the plant, avoiding direct contact with foliage to prevent burn. With these simple care steps, the distinctive green, grey, and silver hues of its foliage will be maintained throughout the growing seasons.

The characteristics of a Koeleria glauca

Koeleria glauca thrives with occasional division, which rejuvenates the plant and encourages vibrant growth. This grass benefits from a well-draining pot, ensuring that moisture does not accumulate at the roots. Its silvery foliage is quite tolerant of a range of soil types, though it flourishes in a sunny spot with moderate watering. An excellent choice for adding texture and a silver-blue hue to any container garden or as a striking accent in rockeries.

Separating/dividing a Koeleria glauca

To propagate Koeleria glauca effectively and invigorate its growth, division is recommended. This process, best carried out in the cooler months of spring or autumn, involves gently lifting the plant from the soil and separating it into smaller clumps. Care should be taken to ensure that each new section has a sufficient root system and shoots for successful reestablishment. Replanting these divisions promptly in well-drained soil will result in a healthier, more robust display of its distinctive silver-green foliage. Regular division also helps to maintain the ornamental appeal and density of this clump-forming grass.

What will be the height of Koeleria glauca?

Koeleria glauca typically reaches a height ranging from 10 to 50 centimeters when fully mature.

What will be the width of Koeleria glauca?

Koeleria glauca will reach a final spread ranging from 10 centimeters to 50 centimeters.

Which soil type is most suitable for the Koeleria glauca?

Koeleria glauca is adaptable to various soil types, but it thrives best in well-drained soil. Optimal drainage is essential to support the healthy growth of this plant.

What is the ideal positioning for the Koeleria glauca?

Koeleria glauca thrives in both sunny and partially shaded locations. This plant can be placed in an area that receives direct sunlight, as well as in a spot with partial shade. This versatility allows for flexible placement within different garden environments.

What is the flowering colour of the Koeleria glauca?

Koeleria glauca displays lovely flower colors in shades of brown and yellow. These delicate hues add a charming touch to the plant during the flowering season.

Is the Koeleria glauca hardy?

Koeleria glauca is indeed winter hardy. It can endure temperatures between -15.0°C and -9.4°C, which aligns with USDA hardiness zones 7b to 8a. This indicates that Koeleria glauca is well-equipped to withstand the winter conditions within these specified temperature ranges.

Is the Koeleria glauca evergreen?

Koeleria glauca is not an evergreen plant. It is deciduous, shedding its leaves in the autumn and regrowing them in the spring.

What is the growth strength of the Koeleria glauca?

Koeleria glauca reaches its full height within a period of two to five years, demonstrating a moderate yet consistent growth rate.

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