Regal Geranium (Pelargonium domesticum)

Regal Geranium

Pelargonium domesticum

Its ruffled blooms paint windowsills with soft pastels, a classic indoor ornamental. Evergreen flowering shrub; common name: Martha Washington Geranium.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Bright indirect to partial direct sunlight; avoid intense midday summer sun to prevent leaf scorch
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Watering Water thoroughly when top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Thrives in 15–22℃; protect from temperatures below 10℃ to avoid leaf drop
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Characteristics

  • Leaf: Round to kidney-shaped, softly hairy, with slightly serrated margins; green to bronze tinted
  • Flower: Clustered umbels of ruffled, double blooms in pink, purple, white, or red
  • Stem: Succulent, green to brownish, with fine pubescence
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Care Guide

Watering

Keep soil evenly moist but not waterlogged; reduce frequency during rainy periods

Fertilization

Feed with diluted balanced liquid fertilizer every 2 weeks. Avoid fertilizing in winter when growth is dormant

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours; dilute 1:20 for root drench; discard solids to prevent pest issues
Pruning
  • Deadhead spent blooms regularly to encourage continuous flowering
  • Trim leggy stems in early spring to maintain compact, bushy growth
  • 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 confirmed toxic; ingestion causes vomiting, anorexia, depression, dermatitis

Humans: Contains geraniol and linalool; ingestion may cause mild gastrointestinal upset; skin contact may trigger mild irritation in sensitive individuals

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Garden Uses & Culture

Culture: Associated with comfort and home warmth; popular in Victorian-era indoor gardens

Usage: Ornamental potted plant for windowsills, patios, and container gardens