PL. —Miscanthus sinensis 'Ferner Osten'Botanical illustration — drop image

Miscanthus sinensis 'Ferner Osten'

Japanese Silver Grass 'Ferner Osten'

SpringSummerFallInvasive

4a–9bHardiness zone

Peak bloom windowZone 6b · frost-offset weeks

Winter

Not in bloom

Spring

Not in bloom

Summer

Peak bloom

Fall

In bloom

Peak bloom

In bloom

Peak bloom windowZone 6b · frost-offset weeks

Winter

Not in bloom

Spring

Not in bloom

Summer

Peak bloom

Fall

In bloom

Peak bloom

In bloom

Background

Miscanthus sinensis 'Ferner Osten' (German for 'Far East') is a compact ornamental grass that produces reddish-pink feathery plumes in mid- to late summer, earlier than most Miscanthus cultivars. The plumes age to silver-white and hold their form into winter. Arching, narrow foliage turns bronze-orange in fall, giving the plant reliable three-season value.

It forms a dense upright clump that stays more contained than the species type. Full sun produces the best plume color and the tightest habit; partial shade is tolerated but reduces vigor and delays plume development. Cut the entire clump to 4–6 inches in late winter before new growth appears. Divide every 5–7 years when the clump center begins to die out. In Zone 4, mulch the crown over winter to insulate against the coldest temperatures.

Miscanthus sinensis has naturalized in parts of the eastern United States. 'Ferner Osten' sets viable seed, so cutting plumes before they shatter limits spread in regions where the species is considered invasive.

Good companions

Black-Eyed Susan Purple Coneflower Stonecrop Little Bluestem

Care guide

SunFull sun

WaterLow to moderate once established

SoilAverage, well-draining; adaptable

Spacing3–4 feet

Height4–5 ft

Zone4a – 9b

Frost hardyInvasive

Seasonal tasks

spring

cutCut the entire clump back to 4–6 inches before new growth emerges in late winter or early spring.

sowDivide congested clumps by digging and splitting the root mass with a sharp spade; discard dead centers and replant divisions at the same depth.

summer

watchMonitor for miscanthus blight: tan lesions with reddish-brown borders spreading across leaf blades. Remove affected foliage and improve air circulation around the clump.

watchCheck for rust: orange-brown pustules on leaf surfaces. Remove heavily infected leaves and avoid overhead watering.

fall

cutRemove plumes before they shatter if spread is a concern in your region; leave standing if winter structure and wildlife cover are priorities.

Common problems

Miscanthus Blight

Symptoms

Tan to brown lesions with darker margins on leaf blades and sheaths, sometimes causing leaf dieback and reduced vigor.

Treatment

Cut and remove affected foliage. Reduce leaf wetness by watering at the base. Divide dense clumps to improve airflow. Clean up and discard debris at season's end.

Rust

Symptoms

Orange to brown raised pustules on the undersides of leaves, with yellow spotting on the upper surface. Heavy infections cause leaves to yellow and drop.

Treatment

Remove and destroy infected leaves. Avoid overhead watering and improve air circulation. Apply a sulfur or copper-based fungicide if it spreads. Clear plant debris in fall.

Fungal leaf spot

Symptoms

Brown or purplish spots on the leaves, often ringed with a yellow halo, that spread and merge in warm, humid, or wet weather; heavily spotted leaves yellow and drop early.

Treatment

Pick off spotted leaves and clear fallen debris to remove overwintering spores. Improve air circulation by thinning, and water at the base so foliage dries quickly. If it persists, apply a copper- or sulfur-based fungicide at the first sign.