Description
Imperata cylindrica is a perennial, rhizomatous grass widely distributed across tropical and subtropical regions. It forms dense clumps of narrow, upright leaves that can reach 1 to 1.5 meters in height. While the wild form is typically green, some horticultural selections such as the popular “Red Baron” type develop striking red-tinted foliage. The species spreads aggressively through a deep, vigorous rhizome system and is known for its resilience in poor soils, high heat, and drought conditions. Its cylindrical, silky white flower spikes appear in late spring to summer, giving a shimmering, feathery appearance.
Though considered a serious invasive species in many regions, cultivated ornamental varieties are valued for their dramatic color and vertical texture in garden designs. It thrives in full sun and well-drained soils and tolerates a wide range of environmental stresses.
Germination Guide
🌍 Tropical and subtropical Asia, Africa, Micronesia, Melanesia, Australia, Southern Europe
Easy
Imperata cylindrica (cogongrass) is a perennial rhizomatous grass native to tropical and subtropical Asia. Seeds germinate quickly without dormancy, making this species easy to propagate from seed.
Germination
Germination time
Expect germination in
14 – 28 days
Temperature
Min 20°C
Ideal 30°C
Max 35°C
🌡️ Temperature alternation recommended
— Optimal around 30°C with light; greater temperature range tolerance in early-type seeds; higher germination with temperature fluctuations
Substrate moisture
💧 Medium
Substrate & Container
Recommended substrate
Well-draining container medium; tolerates various soil types
Recommended container
Containers with drainage
Growing Tips
Surface sow seeds in containers; maintain warm, shaded or semi-shaded position to avoid drying out; keep growing medium damp between watering but not too wet to prevent rot; prick out seedlings when large enough and plant when 10cm tall; light requirement decreases in early-type seeds which show less rigid germination requirements
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