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Carex muskingumensis Oehme

Carex muskingumensis Oehme
American Sedge

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This variety is distinguished by its foliage starting off medium green in spring and then developing thin, yellow margins. It is a palmate sedge with leaves typically arranged radially and horizontally along long, flexible stems, making them resemble little palm trees. It thrives in rich, cool to wet environments, exposed to both sun and shade, making it an ideal plant for pond edges or woodland areas in natural-style gardens. It has a rapid growth rate. Once established, this carex will form a green blanket along pathways or in shaded beds, tolerating even temporary droughts.
Height at maturity
60 cm
Spread at maturity
40 cm
Exposure
Sun, Partial shade, Shade
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Recommended planting time March to May, September to November
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Flowering time July to August
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Description

Carex muskingumensis 'Oehme' is distinguished by its foliage starting medium green in spring and then developing thin, yellow margins. It is a palmate sedge with leaves typically arranged radially and horizontally along long, flexible stems, making them resemble small palm trees. It thrives in rich, cool to moist environments, exposed to sun or shade, making it an ideal plant for pond edges or woodlands in natural-style gardens. It has a rapid growth rate. Once established, this sedge will form a lush cover along paths or in shaded beds, and will even tolerate temporary droughts.

Carex muskingumensis is a perennial gramineous plant, belonging to the Cyperaceae family. It is native to the woodlands and wet plains of the American Midwest. It prefers rich, cool to wet locations, even occasionally waterlogged, without preference for exposure. In hot and dry summers, it needs soil that remains minimally moist. Perfectly hardy, this semi-evergreen sedge tends to thin out during the harshest winters. It compensates by rapidly growing from spring onwards to adorn the garden with its beautiful foliage throughout the year.

The 'Oehme' variety is a mutation of the species, discovered in Wolfgang Oehme's garden in Maryland, United States. Smaller in size, it reaches about 60cm (24in) in height and 40cm (16in) in spread. It forms vigorous clumps, which are initially quite short, with ground-level foliage, followed by vigorous and erect culms. The stems bear abundant medium green foliage finely margined with yellow, which is more intense in summer. The leaves are flexible and slender, arranged almost horizontally and radially on the stems, which themselves end in small golden brown flower spikes in July-August.

This sedge forms a bushy, lush and sculptural clump that works wonders in clearings and woodland edges in natural-style gardens. Consider pairing it with Darmera peltata, large ferns like Matteuccia struthiopteris, and Japanese anemones. Its clump forms a dense and attractive ground cover, shining under rays of sunshine piercing the arboreal canopy. We have planted it on the bank of our stream alongside astrantias, astilbes, and hostas.

Carex muskingumensis Oehme in pictures

Carex muskingumensis Oehme (Flowering) Flowering
Carex muskingumensis Oehme (Foliage) Foliage

Flowering

Flower colour insignificant
Flowering time July to August
Inflorescence Spike

Foliage

Foliage persistence Semi-evergreen
Foliage colour medium green

Plant habit

Height at maturity 60 cm
Spread at maturity 40 cm
Growth rate fast

Botanical data

Genus

Carex

Species

muskingumensis

Cultivar

Oehme

Family

Cyperaceae

Other common names

American Sedge

Origin

North America

Product reference885531

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Planting and care

Plant Carex muskingumensis in a planting hole that is 20x20x20cm (8x8x8in) in size. If your soil is heavy, mix some compost with the crumbled soil, partially fill the hole, and place your plant so that the top of the root ball is covered with 3cm (1in) of soil. Firmly press the soil down and water generously to eliminate air pockets. In dry weather, you will need to water regularly for a few weeks to facilitate the establishment of your young plant. This grass remains decorative all year round but renews its foliage in spring. We recommend pruning your plants to 10cm (4in) in late January or early February to tidy the plant and to make room for new foliage.

 

 

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Planting period

Recommended planting time March to May, September to November

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Edge of border, Slope
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Planting density 6 per m2
Exposure Sun, Partial shade, Shade
Soil pH Acidic, Neutral
Soil type Clayey (heavy), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, rich

Care

Pruning instructions Clean and prune the dead and damaged branches at the end of winter.
Pruning Pruning recommended once a year
Pruning time March to April
Overwinter Can be left in the ground

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