Green Cestrum (Cestrum parqui)

Green Cestrum

Cestrum parqui

Its willowy leaves carry sweet night scent, a hidden hazard in gardens. Evergreen flowering shrub.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; blooms most profusely in full sun, tolerates light afternoon shade in hot climates
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Watering Water deeply when the top 2–3 cm of soil dries out; avoid overwatering to prevent root rot
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Temperature Thrives in 15–28°C; tolerates light frost down to 5°C but requires protection from hard freezes
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Characteristics

  • Leaf: Narrow, lanceolate willow-like leaves, glossy medium green, arranged alternately on stems
  • Flower: Clusters of small tubular yellow-green blooms, emitting strong sweet fragrance at night
  • Stem: Woody branching stems with smooth, light brown bark that becomes slightly fissured with age
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Feed monthly with balanced diluted liquid fertilizer. Discontinue fertilization in autumn to prepare the shrub for dormancy

Banana peel tea:Soak 2–3 chopped banana peels in 1L water for 3 days; dilute 1:10 with water before applying as a root drench to support flowering
Pruning
  • Prune immediately after flowering to shape the shrub and encourage dense new growth
  • Remove dead, diseased, or crossing branches to improve airflow and reduce disease risk
  • Cut back overgrown stems by one-third in early spring to maintain a compact form
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; contains solanine-like alkaloids that cause gastrointestinal and neurological symptoms

Humans: Ingestion causes nausea, vomiting, and abdominal pain; sap may cause mild skin irritation

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental night-scented garden shrub; use with caution due to toxicity to pets and humans