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Japanese sedge

Carex kobomugi
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Carex kobomugi (Japanese sedge) — botanical photograph
Pl. 0F4D — Carex kobomugi
Carex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugiCarex kobomugi
I

Overview

Japanese sedge (Carex kobomugi) is a perennial graminoid native to regions including China North-Central, China Southeast, Japan, Korea, Manchuria, Nansei-shoto, Primorye, Qinghai, Sakhalin, and Taiwan. This plant thrives in moist to wet conditions and prefers light soil types—sandy, medium, or clay—with a pH range of 5.7 to 7. It can grow up to 0.2 meters tall and prefers full sun to partial shade. Japanese sedge is known for its edible parts, specifically the root and seed, which can be consumed raw or cooked, and the seeds can be ground into flour for various cooking uses. This plant has been introduced to areas such as Delaware, Maryland, New Jersey, New York, North Carolina, Oregon, Rhode Island, and Virginia, where it can serve as a valuable resource. Its adaptability to a wide range of conditions makes it suitable for cultivation in environments with similar soil and light preferences. However, it should be noted that Japanese sedge has weed potential, so careful management is recommended.

Quick answers

What is Japanese sedge?

Japanese sedge (Carex kobomugi) is a perennial graminoid native to regions including China North-Central, China Southeast, Japan, Korea, Manchuria, Nansei-shoto, Primorye, Qinghai, Sakhalin, and Taiwan.

Growingconditions · propagation · uses
V

Cultivation

Japanese sedge, or Carex kobomugi, thrives in full to partial sun and prefers moist to wet soil, making it suitable for areas with consistent moisture. It grows well in light (sandy), medium, and heavy (clay) soils and has a pH preference of 5.7 to 7. This perennial, which reaches a height of 0.2 meters, is hardy in zones 6-8 and is a graminoid in habit. For propagation, gardeners can use root and seed cuttings.
Light
Full sun, Partial sun/shade
Water
Moist, Wet
Soil
Light (sandy), Medium, Heavy (clay)
Hardiness
6-8
Life cycle
Perennial
Habit
Graminoid
Mature size
0.2 m tall
Soil pH
5.7–7
For first-time growers

How to grow Japanese sedge for the first time

8steps

Start with Japanese sedge to add a low-maintenance, attractive plant to your garden.

  1. 1

    What you'll need

    Japanese sedge plants or seeds, potting soil, containers if planting in pots.

  2. 2

    Best time to plant

    Plant Japanese sedge in spring after the last frost or fall before the first freeze.

  3. 3

    Soil and container prep

    Use well-draining soil with a pH between 5.7 and 7. Ensure containers have drainage holes.

  4. 4

    Sowing or transplanting

    Transplant young plants from nurseries, or sow seeds directly in the garden after danger of frost is past.

  5. 5

    First two weeks

    Water regularly to keep soil moist but not waterlogged. Avoid direct sunlight for a week.

  6. 6

    Ongoing care

    Provide partial sun and regular watering, especially during dry spells. Divide plants every 3-4 years.

  7. 7

    Harvest or pruning

    Prune dead foliage to maintain appearance but avoid cutting into the main stem.

  8. 8

    Common mistakes

    Overwatering, planting in full sun, neglecting to divide overcrowded plants.

VI

Edible & utility

Edible parts:RootSeed
Edible uses: The Japanese sedge is edible and its root and seeds can be consumed. Roots are typically dug and eaten raw or cooked, while seeds can be harvested and ground into flour for various uses in cooking. Skip the preparation details to maintain brevity.
Contextrange · companions · related
VII

Distribution

10 native · 8 introduced
Distribution across1 continent· 10 native· 8 introduced
Asia4 regions
native (4)ChinaJapanSouth KoreaTaiwan
Broader regions
native:Nansei-shoto, Primorye, Sakhalin
introduced:Delaware, Maryland, New Jersey, New York, North Carolina, Oregon, Rhode I., Virginia
IX

Specimen gallery

1 image
Carex kobomugi (Japanese sedge) — botanical photograph
Japanese sedge (Carex kobomugi)
XI

Explore further

Growing zone
XII

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