grass
Carex oshimensis
Japanese sedge
Not currently listed at our partner nurseries.
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Essentials
At a Glance
Plant Type
Grass
Height
12 inches
Width
24 inches
Light
Partial Sun, Shade
Zones
5, 6, 7, 8, 9
Water
Moderate
Humidity
Moderate to high
Lifespan
Perennial
Native To
Japan
Toxicity
Non-toxic
The Story
Plant Bio
Carex oshimensis, commonly known as Japanese sedge, is a clumping perennial grass that prefers moist, shady environments. This species is particularly valued for its lush, evergreen foliage and ability to thrive in challenging shade conditions.
Bloom Period:
J
F
M
A
M
J
J
A
S
O
N
D
EarlyLate
Uses & Benefits:
Carex oshimensis offers elegant, silvery foliage that adds texture and contrast to shaded garden areas.
Provides ground coverage to suppress weeds and prevent soil erosion.
Supports local biodiversity by providing habitat and food for insects and birds.
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
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Planting
How to Grow
- Tuck seeds or division into prepared soil in early spring.
- Water thoroughly after planting to settle soil.
- Mist cuttings regularly to maintain humidity.
- Fertilize lightly in spring with a balanced fertilizer.
- Mulch around plants to retain moisture during summer.
- Divide clumps every 2-3 years in early spring or fall.
Pro Tip
Provide consistent moisture and partial shade for best growth.
Keep It Thriving
Care Guide
Do
- Keep soil moist, especially during dry periods 🌱
- Apply mulch to conserve moisture and suppress weeds
- Prune dead or damaged foliage in early spring
Don't
- Avoid overwatering which can lead to root rot ❌
- Do not expose to full, harsh sunlight in hot climates
- Refrain from neglecting division to prevent overcrowding
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Prune |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Silvery-foliaged groundcover for shaded bordersTextural contrast in woodland gardensSoft, ornamental edging in shaded pathways
Companion Plants
Hosta Ferns Astilbe Ligularia Japanese painted fern
Multiply
Propagation Methods
Good to Know