Imperata cylindrica

Cogon grass / Japanese blood grass

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Perennial rhizomatous grass known for its vibrant foliage and invasive potential. Often used as an ornamental accent, with red-leafed cultivars being particularly popular. Hardy but requires full sun.
yard Outdoor plants wb_sunny Sun pets Not pet-safe
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Plant Details

Common Name Cogon grass / Japanese blood grass
Family Poaceae
Genus Imperata
Species Cylindrica
Origin Asia / Australia
Blooming Flowering in summer, producing feathery plumes
Leaf Color Green / Red (cultivars)
Sunlight Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Well-draining sandy loam or potting mix with perlite. Tolerates poor soils.

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Watering

Drought tolerant once established. Keep moist during establishment, reduce watering in winter to prevent rot.

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Sunlight & Care

Full sun required for optimal color and vigor; tolerates partial shade but leggy growth may occur.

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Fertilization

Low nutrient needs. Apply slow-release fertilizer in spring only.

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Pruning

Cut back to ground level in late winter before new growth emerges.

Pest Control Aphid Scale Insect Spider Mite Thrip

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 3 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
50° – 100°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
20% – 75%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
2000 – 40000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
100 – 2500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
15% – 45%
% volumetric
Water content in the growing medium
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Soil EC
300 – 2500
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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