Cogongrass 'Rubra' (Imperata cylindrica 'Rubra')

Cogongrass 'Rubra'

Also known as: Bladey grass 'Rubra', Silver spikegrass 'Rubra', Alang-alang 'Rubra'

The cogongrass 'Rubra' is a species of grass. This cultivar is sometimes referred to as Japanese blood grass. It is ornamental and has red and green tinges in its foliage, a fact that inspired its name. It does not often flower. While many varieties of Cogongrass are invasive and considered weeds, cogongrass 'Rubra' is non-invasive and does not spread.

Scientific classification

Grasses, sedges and allies

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50 cm

Plant Height

50 cm

Spread

Green, Red

Leaf Color

3 cm

Flower Size

Silver, White, Green

Flower Color

Green, Red, Gray, Silver

Stem Color

Deciduous

Leaf type

15 - 35 ℃

Ideal Temperature

Rapid

Growth Rate

Images of Cogongrass 'Rubra'

Quickly Identify Cogongrass 'Rubra'

Distinct color gradient from green to red along plant's length.

Narrow, linear leaves with sharp pointed tips aiding in identification.

Inconspicuous, small white to beige flowers in clusters on fibrous spikelets.

Flowers have a feathery appearance with subtle, fine texture.

Rare blooming pattern, sporadic year-round flowering in semi-tropical or tropical regions.

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Care Guide for Cogongrass 'Rubra'

Every week

Water

Full sun

Sunlight

15 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Pruning: Cogongrass 'Rubra' features striking red foliage. Prune early spring to promote new growth and maintain shape, removing dead stems. Cutting back can control spread. Use sharp tools to avoid disease. This timing is recommended for optimal health and growth.

Propagation: Cogongrass 'Rubra' is a perennial grass from Southeast Asia, known for its red-tipped leaves. Propagate by dividing the root system from mature clumps, ensuring each piece has a growth node. Replant in well-drained soil, water consistently, and monitor for pests due to its invasive nature.

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