Carex oshimnesis 'J. S. Greenwell'

Carex oshimnesis ‘J. S. Greenwell’

Japanese sedge 'J. S. Greenwell'

£15.95

Carex oshimensis ‘J. S. Greenwell’ is a striking ornamental grass prized for its graceful arching foliage and vibrant green colour. This perennial grass typically reaches heights of 20-50cm with a similar spread, making it perfect for borders, edging, or ground cover.

Thriving in partial shade to full sun and well-drained soil, it requires minimal maintenance once established. Drought-tolerant and evergreen, ‘J. S. Greenwell’ adds texture and visual interest to any garden landscape. Its compact size and lush foliage make it a versatile choice for both traditional and modern garden designs.

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Origin: Cultivar of horticultural origin, species native to Izu Ōshima, Japan
Genus: Carex
Species / Cultivar: oshimensis 'J. S. Greenwell'
Common Name: Japanese sedge 'J. S. Greenwell'

Plant Biography

Carex oshimensis is a species of sedge native to the Oshima Island region of Japan. This evergreen perennial belongs to the Cyperaceae family and is commonly found in moist, shaded environments such as forest floors and stream banks. Historically, it has been used in traditional Japanese gardens for its attractive foliage and ability to thrive in low-light conditions.

Carex oshimensis gained international recognition for its ornamental value, leading to the development of many cultivars within the horticultural trade. These cultivars are prized for their striking variegated leaves and low-maintenance growth, making them a favourite in modern landscaping and garden design.

Carex oshimnesis ‘J. S. Greenwell’
Soil: Moist but Well Drained
Soil that allows water to drain at a moderate rate, without the water pooling.
Growth Rate: Fast
Expect to see prolific growth, especially during growing season.
Water Requirement: Medium
Once it is established, this plant is likely to only require watering during drier periods.
Maintenance: Low
Minimal skill or input needed beyond the basics, a very independent plant.
Situation: Full Sun to Part Shade
Enjoys direct sun most of the day, but tolerant of fewer sunlit hours or light dappling.
Eventual Height: 0.2-0.5m
The plant's ultimate height in typical growing conditions.
Eventual Spread: 0.2-0.5m
The plant's ultimate spread in typical growing conditions.
Hardiness: Hardy
Survives unprotected in an average winter. May need protection in extreme long frosts.
Habit: Evergreen
Always in leaf throughout the year. It won't lose all its leaves at any one time.
Lifecycle: Perennial
This plant is persistant and does not die off after flowering. It will return each season indefinitely, if provided with suitable growing conditions.
Care & Size Guidance

Care & Size Guidance

Carex oshimensis ‘J. S. Greenwell’ is a low-maintenance, evergreen sedge that thrives in partial shade to full sun and well-drained soil. It reaches a compact size of 20-50cm in height and width, making it ideal for borders, containers, and ground cover.
This drought-tolerant perennial requires regular watering during dry spells but is otherwise easy to care for. Prune back any damaged or dead foliage in early spring to maintain its tidy appearance. ‘J. S. Greenwell’ features verdant, green foliage which adds year-round interest and vibrant colour to any garden landscape.

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