Scirpus cernuus - Fibre Optic Grass
Scirpus cernuus - Fibre Optic Grass
Scirpus cernuus - Fibre Optic Grass
Scirpus cernuus - Fibre Optic Grass
Scirpus cernuus - Fibre Optic Grass
Scirpus ou isolepis cernua cernuus Fiber Optic Grass
Slender Club-rush, Nodding Club-rush
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Description
Scirpus cernuus, also known as Nodding Club-rush or Fibre Optic Grass, is a small perennial grass that catches everyone's attention. It is truly unique and visually appealing, with its clusters of small light green to white flowers attached to the ends of bright acidic green stems. This sight evokes a bouquet of fibre optics. It is a tender plant that flowers almost all year round indoors. It will thrive in moist soil, along water edges, or even submerged, in full sun. Cultivated in a pot, this 'grass' will create a focal point on the terrace or in the conservatory.
Fibre Optic Grass is also known as Isolepis cernua. It is an ornamental grass native to marshy areas in Western and Southern Europe and North Africa, belonging to the Cyperaceae family. This small plant slowly forms a fairly rounded, dense, spreading clump, measuring 30 cm (11.8 in) in height and 40 cm (15.7 in) in diameter. It is a semi-aquatic and rhizomatous perennial plant that resembles a small rush. It has foliage consisting of a bouquet of thread-like, leafless, shiny, very stiff, bright acidic green stems. The flowering is continuous, illuminating the tips of the stems with tiny cream-greenish spikelets accompanied by wider bracts. The flowering gives way to brown fruits called achenes. The plant can withstand temperatures of around -8°C (18°F) when grown in the ground.
This sedge is magnificent when suspended in the conservatory or on the terrace, in full sun. To achieve a trailing habit, often sought after, it is preferable to place the plant in a shaded area, although this cultivation method may shorten its lifespan. In the garden, this small 'grass' can be planted along water edges, in marshy areas, or in pots that are partially submerged. Except in the mildest climates, it is advisable to overwinter this plant to protect it from severe frosts.
Scirpus cernuus - Fibre Optic Grass in pictures
Flowering
Foliage
Plant habit
Botanical data
Scirpus ou isolepis cernua
cernuus
Fiber Optic Grass
Cyperaceae
Slender Club-rush, Nodding Club-rush
isolépis cernua
Mediterranean
Planting and care
Scirpus cernuus thrives in full sun, in saturated to moist soil. It is undemanding about the nature of the soil. If the stems dry out due to lack of water, prune the brown parts and water generously; the plant will usually regrow. It is hardier when it is a young plant.
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).
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.
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