Corynephorus canescens Spiky Blue - Sand fescue
Corynephorus canescens Spiky Blue - Sand fescue
Corynephorus canescens Spiky Blue
Grey Hair-grass, Grey Clubawn Grass
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This plant carries a 12 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Description
The Corynephorus canescens Spiky Blue', also known as the Silver Corynephorus, is a small evergreen grass of poor, sandy soils sometimes called Sand Rush. It is interesting for its sea urchin-like appearance and steel blue foliage that turns slightly reddish in summer, complemented by a late summer flowering with white panicles. It is a short-lived perennial plant that self-seeds where it is happy. Resistant to drought and sea spray, this Corynephorus is ideal for coastal areas, green roofs, and natural-style dry gardens.
The Corynephorus canescens Spiky Blue is a herbaceous perennial plant belonging to the large family of Poaceae. Its wild ancestor is native to Europe, the Middle East, and North Africa, but it is also found in North America. Its natural habitat consists of sandy or rocky, poor, well-drained soils with a tendency towards acidity or limestone. Its rootstock is described as tufted, meaning it does not have trailing rhizomes and is not invasive. However, its roots help stabilise dunes.
The 'Spiky Blue' cultivar was selected for its particularly bluish foliage. The plant forms a dense shrub with a rounded habit, measuring about 30 cm (12in) in all directions. Its upright culms have violet nodes and bear thread-like, very thin, and erect leaves. They are distinctly rolled, stiff, and rough. The flowering period is from May to July, varying depending on the climate. It takes the form of 40 cm (16in) tall floral stems with white panicles of spikelets.
The Sand Rush Spiky Blue is ideal for coastal areas, especially for stabilising dunes. Rocky and dry soils, as well as slightly arid slopes, are also favourable environments for this resilient grass. It is also highly ornamental as a border plant or in small clusters within larger gravel beds. It can also be trimmed short to create a lawn-like ground cover. It is used in green roofs, often accompanied by Calamagrostis, Stipa tenuifolia, tall sedums, and other grasses.
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Flowering
Foliage
Plant habit
Botanical data
Corynephorus
canescens
Spiky Blue
Poaceae
Grey Hair-grass, Grey Clubawn Grass
Western Europe
Planting and care
The Corynephorus canescens 'Spiky Blue' likes very sunny places and poor, light, sandy or stony, degraded soils. Tolerant, it tolerates both acidic and neutral or slightly alkaline soils. A fairly hardy native plant, it withstands hot and dry summers well. In nature, this grass grows in dunes, almost entirely composed of pure, salty sand. It also tolerates sea spray very well. With a relatively short lifespan, this sand fescue readily self-seeds in light and sandy soils, but not always faithfully compared to the parent plant.
Excessive soil fertility is detrimental as it can encourage lush vegetation at the expense of flowers. A spring application of compost can be beneficial in very poor soils. Grasses are good plants for containers: use a compost based on potting soil and add 20% sand or fine gravel to lighten the mix. The foliage can be left until February, as it provides structure and movement in flowerbeds. The plants will then be pruned to 10 cm (4in) above ground level when growth resumes.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.