Citronella Geranium (Pelargonium citronellum)

Citronella Geranium

Pelargonium citronellum

Its citrusy scent repels mosquitoes, a functional beauty for patios. Aromatic herbaceous perennial; common name: sweet scented geranium.

Full sun to partial shade; tolerate 4–6 hours of direct daily sun, with afternoon shade recommended in hot, arid regions to prevent leaf scorch
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerate 4–6 hours of direct daily sun, with afternoon shade recommended in hot, arid regions to prevent leaf scorch
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Watering Water when the top 2–3 cm of soil feels completely dry; avoid overwatering to prevent root rot and fungal growth
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Temperature Thrives in 18–25°C; protect from temperatures below 10°C to avoid frost damage, move indoors during cold winters
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Characteristics

  • Leaf: Round to shallowly lobed, fuzzy green foliage that releases a strong lemon-citronella aroma when crushed
  • Flower: Clusters of small, pale pink to white five-petaled blooms with subtle veining
  • Stem: Succulent, green to reddish-brown branching stems with fine hairs
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Care Guide

Watering

Keep soil evenly moist but not waterlogged, water deeply when topsoil is dry

Fertilization

Diluted balanced liquid fertilizer every 2 weeks. Avoid fertilizing in autumn and winter when growth slows to prevent nutrient buildup

Banana peel compost tea:Compost banana peels for 2–3 weeks to break down, steep in water for 24 hours, dilute 1:20 with water before applying as a root drench to avoid pest infestations from raw organic matter
Pruning
  • Deadhead spent flower clusters regularly to encourage continuous blooming throughout the growing season
  • Trim leggy or overgrown stems in early spring to maintain a compact, bushy shape
  • Remove yellowing or damaged leaves to improve airflow and reduce the risk of fungal disease
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion may cause vomiting, anorexia, lethargy, and skin irritation from contact

Humans: Mild gastrointestinal upset if ingested in large quantities; may cause skin irritation in sensitive individuals

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Garden Uses & Culture

Culture: Valued as a natural mosquito repellent; symbolizes comfort and home warmth in some gardening traditions

Usage: Ornamental container plant, aromatic foliage for potpourri, natural pest deterrent for patios