Citronella Grass (Cymbopogon nardus)

Citronella Grass

Cymbopogon nardus

Its sharp citrus scent repels mosquitoes, a functional beauty for warm gardens. Clumping perennial grass; common name: Citronella Grass.

Full sun
2–3/week
Beginner
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Plant Needs

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Sunlight Requires full sun for optimal growth and maximum scent production; tolerates partial shade with reduced foliage density
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Watering Keep soil consistently moist but not waterlogged; reduce watering frequency in cooler, dormant months
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Temperature Thrives in warm tropical to subtropical temperatures; cannot tolerate frost or prolonged temperatures below 10°C
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Characteristics

  • Leaf: Long, linear blue-green to dark green blades with sharp edges; emits strong citrus scent when crushed
  • Stem: Thick, upright culms forming tight, dense clumps
  • Inflorescence: Branched panicles with small, inconspicuous flowers (rarely produced in cultivated settings)
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Care Guide

Watering

Keep top 2 cm of soil moist; water deeply to encourage root growth

Fertilization

Apply balanced granular fertilizer every 4 weeks. Use slow-release fertilizer to support steady foliage growth without burning roots

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours, dilute 1:20 for root drench to enhance foliage health and scent intensity
Pruning
  • Trim yellow or brown leaf blades at the base to maintain tidy clump appearance
  • Cut back entire clumps by half in early spring to stimulate fresh, vigorous new growth
  • Remove any emerging flower stalks promptly to direct plant energy to foliage production
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no adverse effects from ingestion or contact

Humans: No known toxicity to humans; safe for handling and culinary/aromatherapy use in diluted forms

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Garden Uses & Culture

Culture: Associated with outdoor summer pest control; used in traditional aromatherapy for its calming, insect-repellent properties

Usage: Mosquito repellent, essential oil production, ornamental border grass