Scarlet Geranium (Pelargonium inquinans)

Scarlet Geranium

Pelargonium inquinans

Vibrant scarlet blooms cluster like festive pom-poms, brightening window sills. Evergreen flowering perennial; common name: Scarlet Geranium.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Bright indirect to full morning sun; tolerate 4–6 hours of direct morning sun, avoid harsh midday sun to prevent leaf scorch
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Watering Water when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot and fungal diseases
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Temperature Thrives at 15–25°C; protect from frost below 10°C and extreme heat above 30°C to avoid stress
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Characteristics

  • Leaf: Round to kidney-shaped, fuzzy, with slightly serrated margins and a distinct citrusy scent when crushed
  • Flower: Dense umbels of bright scarlet, pink, or white five-petaled blooms
  • Stem: Succulent, green to reddish-brown, branching freely to form a bushy habit
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Care Guide

Watering

Keep soil evenly moist but not waterlogged; water deeply when topsoil dries

Fertilization

Diluted balanced liquid fertilizer every 2 weeks. Cease fertilization in autumn and winter when growth slows

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations and odor
Pruning
  • Deadhead spent blooms regularly to encourage continuous flowering throughout the growing season
  • Pinch back stem tips in early spring to promote bushy, compact growth
  • Trim leggy stems in mid-summer to maintain a neat, rounded habit
  • Remove yellowing or damaged leaves to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to geraniol and linalool; may cause vomiting, anorexia, depression, and contact dermatitis

Humans: Mild skin irritation or allergic reaction from handling; ingestion may cause mild gastrointestinal upset

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Garden Uses & Culture

Culture: Associated with friendship and positive energy in Western floral symbolism

Usage: Ornamental container plant for patios, windowsills, and hanging baskets