Zonal Geranium (Pelargonium × hortorum)

Zonal Geranium

Pelargonium × hortorum

Its ruffled blooms cluster like living confetti, brightening windowsills and borders. Flowering perennial bedding plant; common names: Zonal Geranium, Garden Geranium.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Requires 6–8 hours of direct sunlight daily for optimal blooming; provide afternoon shade in hot, arid regions to prevent leaf scorch
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Watering Water deeply when the top 2–3 cm of soil feels dry; avoid overwatering to prevent root rot and fungal diseases
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Temperature Thrives in 18–24°C; protect from temperatures below 10°C to avoid leaf drop and frost damage
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Characteristics

  • Leaf: Round to kidney-shaped, fuzzy texture, with distinct dark brown zonal markings on upper surface
  • Flower: Dense umbel clusters of 5-petaled blooms in red, pink, white, or salmon hues
  • Stem: Succulent, green to reddish-brown, covered in fine, soft hairs
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; water early morning to reduce fungal growth on foliage

Fertilization

Diluted balanced liquid feed every 2 weeks. Stop fertilizing in late autumn to encourage natural dormancy through winter

Banana peel compost tea:Use fully composted banana peels soaked in water for 24 hours; dilute 1:20 for root drenching to avoid pest infestations from raw peels
Pruning
  • Deadhead spent bloom clusters regularly to promote continuous flowering throughout the growing season
  • Pinch back stem tips in early spring to encourage bushier, more compact growth
  • Trim leggy stems in mid-summer to maintain a neat mounded 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 gastrointestinal distress and dermatitis

Humans: Mild oral irritation and stomach upset if ingested; contact dermatitis in skin-sensitive individuals

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Garden Uses & Culture

Culture: Associated with friendship and cheerful energy; a staple of cottage garden and container patio aesthetics

Usage: Ornamental bedding plant, window box filler, and indoor flowering container plant