Zonal Geranium (Pelargonium zonale)

Zonal Geranium

Pelargonium zonale

Its zoned leaves hold warm, cheerful blooms—sunlit patio staple. Flowering perennial shrub; common names: zonal geranium, horseshoe geranium.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; 6–8 hours of direct sunlight daily for optimal blooming, avoid intense midday sun in hot arid regions
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Watering Water thoroughly when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot and fungal growth
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Temperature Thrives at 18–24℃; protect from frost, keep above 10℃ during winter dormancy
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Characteristics

  • Leaf: Round to kidney-shaped, fuzzy texture, with distinct brown "zone" marking on upper surface
  • Flower: Clustered umbels of single/double blooms in red, pink, white, or salmon hues
  • Stem: Succulent, green to reddish-brown, with glandular hairs that release a pungent scent when crushed
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Care Guide

Watering

Keep soil evenly moist but not waterlogged; water at the base to avoid wetting foliage

Fertilization

Diluted balanced liquid feed every 2 weeks. Stop fertilizing in early autumn to encourage the plant to enter dormancy for winter

Banana peel tea:Soak chopped banana peels in water for 3 days, dilute the infusion 1:10 with water for root drenching; discard solid peels to avoid pest infestations and odor
Pruning
  • Deadhead spent bloom clusters regularly to stimulate continuous flowering throughout the growing season
  • Pinch back stem tips in early spring to promote bushy, compact growth instead of leggy stems
  • Trim yellowing or damaged leaves at the base to improve airflow and reduce disease risk
  • Cut back stems by one-third in late autumn to prepare the plant for winter dormancy
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to geraniol and linalool; may cause digestive and neurological symptoms

Humans: Mild skin irritation in sensitive individuals; mild gastrointestinal distress if ingested

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Garden Uses & Culture

Culture: Symbolizes friendship and cheerful energy; a staple in traditional cottage garden designs

Usage: Ornamental container plant, garden bedding plant, and cut flower for small bouquets