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Korean Feather-Reed Grass
Calamagrostis brachytricha
Easy · Beginner friendlyAbout Korean Feather-Reed Grass
Korean Feather Reed Grass is an elegant East Asian ornamental grass reaching 3-4 feet tall, with arching green leaves topped by upright feathery purplish-pink plumes in late summer. Unlike its more familiar relative Calamagrostis acutiflora, this species blooms later and tolerates partial shade—making it valuable for woodland-edge plantings in American gardens. The plumes age to silver-tan and persist through winter.
- Shade-tolerant
How to care for Korean Feather-Reed Grass
Watering
- Springevery 10 days
- Summerevery 14 days
- Fallevery 14 days
- Winterevery 30 days
Soil · Well-draining
- Top dressingPine bark mulch10%
- Main mixPotting soil + perlite 2:170%
- DrainageLECA / gravel20%
Never skip the drainage layer — standing water is the top cause of root rot.
FERTILIZER
- Springevery 60 days
At a Glance
- NativeEast Asia
- Height3–4 ft (0.9–1.2 m)
- Spread2–3 ft (0.6–0.9 m)
- Flower colorPink, White
- Foliage colorGreen
- SoilLoamy, Moisture-retentive
- LocationsYard
Bloom time
BLOOM CYCLE
Peak bloom
Aug–Sep
Feathery purplish-pink plumes in late summer
Toxicity
Humans Safe · Pets Safe
None reported
Safe
EXPOSURE No exposure route is reported.
EFFECT No toxic effect is reported.
NOTE Listed as non-toxic for humans; avoid eating ornamental plants unless confirmed edible.
Safe
EXPOSURE No exposure route is reported.
EFFECT No toxic effect is reported.
NOTE Listed as non-toxic for dogs; avoid eating ornamental plants unless confirmed edible.
Safe
EXPOSURE No exposure route is reported.
EFFECT No toxic effect is reported.
NOTE Listed as non-toxic for cats; avoid eating ornamental plants unless confirmed edible.
Educational information, not medical or veterinary advice. If exposure is suspected, contact a doctor or veterinarian.
DISTRIBUTION
- Native
- East Asia
History
Calamagrostis brachytricha, commonly called Korean feather reed grass or diamond grass, is a cool-season clumping perennial grass in the family Poaceae native to a broad range across Korea, Japan, northern China, southeastern Siberia, and into the Russian Far East, growing in moist forest edges and grasslands. German botanist Ernst Gottlieb von Steudel described the species in 1854. In some modern treatments the species is placed in Achnatherum (as A. brachytrichum) because the inflorescence is a panicle rather than the spike-like structure typical of Calamagrostis, but horticultural trade retains Calamagrostis.
The epithet brachytricha means short-haired. Plants form 60-90 cm tall upright clumps of arching bright green blades, sending up erect flowering stems to 120 cm topped by distinctive 15-25 cm feathery panicles that emerge pink-bronze and fade to silver-white, persisting decoratively into winter.
Tolerates light shade and moist soil better than most ornamental grasses, making it valuable for woodland-edge plantings. Introduced to American horticulture in the late 20th century, it has gained popularity for its rare combination of ornamental grass beauty and shade tolerance—filling a niche unmet by most ornamental grasses.
Symbolism & meaning
What It Symbolizes
Korean Feather-Reed Grass suggests endurance dressed as grace. Its arching plumes catch low autumn light and persist beautifully through winter, refusing to collapse when other ornamental grasses fall. In light shade it brings an elegant, almost calligraphic form — a reminder that lasting through hard seasons need not mean giving up on beauty.
- Endurance — plumes persist beautifully through winter
- Grace — elegant form in light shade
Where the Name Comes From
'Calamagrostis' from Greek 'kalamos' (reed) and 'agrostis' (grass); 'brachytricha' from Greek meaning short-haired.
Uses & Fun Facts
- Late-summer purplish-pink plumes for woodland-edge and partial-shade borders
- Feathery seedheads dry to silver-tan for autumn arrangements
Related plants
More Calamagrostis plants
Plants with similar care
Chinese AbeliaAbelia chinensis
Fragrant AbeliaAbelia mosanensis
Large-Flowered AbeliaAbelia uniflora
Glossy AbeliaAbelia x grandiflora
Frequently asked questions
How often should I water Korean Feather-Reed Grass?
In summer, water about every 14 days; in winter, about every 30 days. Adjust for heat, pot size and drainage.
How much light does Korean Feather-Reed Grass need?
Full sun: 6+ hrs direct. Watch the leaves — scorching or stretching means the light needs adjusting.
Is Korean Feather-Reed Grass toxic to cats or dogs?
Pets Safe (Dogs Safe · Cats Safe) Educational information, not medical or veterinary advice. If exposure is suspected, contact a doctor or veterinarian.
Is Korean Feather-Reed Grass easy to grow?
Yes — it is considered an easy, beginner-friendly plant.
When does Korean Feather-Reed Grass bloom?
It typically blooms Aug–Sep in the Northern Hemisphere.
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