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Carex oshimensis Evergreen - Oshima Sedge

Carex oshimensis Evergreen
Evergreen Sedge, Oshima Sedge, Japanese Sedge

3,5/5
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Laora, 27/11/2023

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This plant carries a 12 months recovery warranty

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This carex forms a small, slightly relaxed, compact tuft with shiny green ribbon-like foliage. Its autumn flowering is discreet, with small greenish-brown spikes. This grass is superb in rockeries or borders where it covers the ground like a short grass meadow over time. It prefers moist to dry, fertile but well-drained soils, in partial or even in the dry shade of woodland areas, with occasional watering.
Flower size
2 cm
Height at maturity
35 cm
Spread at maturity
30 cm
Exposure
Sun, Partial shade, Shade
Hardiness
Hardy down to -18°C
Soil moisture
Dry soil, Moist soil
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Best planting time March to April, September to October
Recommended planting time February to April, September to November
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Flowering time August to October
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Description

Carex oshimensis Evergreen, also known as Oshima Sedge. It grows into a small, evergreen tuft with slightly dishevelled, dense, and ribbon-like bright green foliage. Its flowering in autumn is modest, with small greenish-brown spikes. This grass looks stunning in rockeries and borders. Over time, it covers the ground like a short grass meadow. It prefers cool to dry, fertile, but well-drained soils, in partial shade or even in the dry shade of undergrowth, with occasional watering.
 
Carex oshimensis Evergreen is a type of sedge that belongs to the Cyperaceae family. It is a small grass with a short rootstock that forms a very compact, dense, and upright tuft. It can grow up to 35 cm (13.8 in) tall and has a diameter of 30 cm (11.8 in). The leaves of this sedge are evergreen and have a grassy appearance. They can grow up to 40 cm (15.7 in) long and have tapering edges with drooping tips. They are bright spring green in colour and look very similar to a lawn. In autumn, short greenish spikes measuring 1 to 3 cm (1.2 in) appear among the foliage on thin stems measuring 15 cm (5.9 in) in height.

Oshima Everdi sedge is a small, refined herb with a minimalist style that will create a beautiful foliage bouquet on the border of a path or flowerbed. This plant brings a lot of lightness to the lush foliage of rodgersia and the feathers of ferns and pairs well with heucheras. As this grass tolerates dry shade, it naturally finds its place in the undergrowth, taking the place of adventives. It can also be planted in water gardens, on banks, or along the edge of a water feature, where it helps with stabilisation. You can plant it in mass in a contemporary or country garden for a beautiful, wild effect. This carex tolerates occasional drought well, making it an excellent choice for rockeries, cotton lavender and wormwood.

Carex oshimensis Evergreen - Oshima Sedge in pictures

Carex oshimensis Evergreen - Oshima Sedge (Foliage) Foliage

Flowering

Flower colour insignificant
Flowering time August to October
Inflorescence Spike

Foliage

Foliage persistence Evergreen
Foliage colour green

Plant habit

Height at maturity 35 cm
Spread at maturity 30 cm
Growth rate normal

Botanical data

Genus

Carex

Species

oshimensis

Cultivar

Evergreen

Family

Cyperaceae

Other common names

Evergreen Sedge, Oshima Sedge, Japanese Sedge

Origin

Cultivar or hybrid

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Planting and care

Carex oshimensis Evergreen is a type of grass that can grow well in various soil types as long as they are relatively moist and well-draining. It can withstand moderate droughts, making it an easy plant to cultivate and care for. This grass can also adapt to different sunlight exposures, although some watering may be necessary in dry woodland areas. It is vital to water the grass abundantly during planting and avoid using heavy fertilisers. Additionally, damaged foliage should be removed during vegetation, and the clump should be trimmed at the end of winter, just before the start of vegetation.

Planting period

Best planting time March to April, September to October
Recommended planting time February to April, September to November

Intended location

Suitable for Rockery, Shaded rockery, Woodland edge
Type of use Edge of border, Container, Slope
Hardiness Hardy down to -18°C (USDA zone 7a) Show map
Ease of cultivation Beginner
Planting density 5 per m2
Exposure Sun, Partial shade, Shade
Soil pH Any
Soil type Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, well draining

Care

Pruning instructions Remove old foliage using a rake or by hand, as this grass does not tolerate pruning.
Pruning Pruning recommended once a year
Pruning time February to April
Disease resistance Very good
Overwinter Can be left in the ground
3,5/5
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