Fragile Cestrum (Cestrum fragile)

Fragile Cestrum

Cestrum fragile

Its tubular blooms release sweet night scents, a subtle nocturnal charm. Evergreen flowering shrub; common name: Fragile Cestrum.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Thrives in full to partial sunlight; produces the most blooms in bright, direct sun, with afternoon shade recommended in extremely hot climates
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Watering Water thoroughly when the top 2–3 cm of soil feels dry; avoid overwatering to prevent root rot and fungal growth
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Temperature Optimal growth at 18–27°C; protect from frost, as temperatures below 10°C may cause leaf drop and stem damage
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Characteristics

  • Leaf: Simple, ovate to lanceolate leaves; glossy medium green, opposite arrangement with smooth margins
  • Flower: Slender tubular pale yellow to white blooms; clustered at stem tips, releasing intense sweet fragrance after dark
  • Stem: Slender, green to brownish woody stems with fine pubescence when young
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Care Guide

Watering

Keep soil consistently moist but not waterlogged to support active growth and flowering

Fertilization

Apply diluted balanced liquid fertilizer every 2 weeks to support flowering. Discontinue fertilization in autumn and winter when plant growth slows significantly

Banana peel compost tea:Compost banana peels for 2–3 weeks to break down organic matter, steep in water for 24 hours, dilute 1:20 with water before applying as a root drench; avoid using raw peels to prevent pest infestations
Pruning
  • Deadhead spent flower clusters regularly to encourage continuous blooming throughout the growing season
  • Prune overgrown or leggy branches in early spring to maintain a compact, rounded shape
  • Remove damaged, diseased, or yellowing stems to improve airflow and reduce disease risk
  • Trim back up to one-third of the plant in late winter to stimulate new growth for the following season
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-confirmed toxic; ingestion may cause vomiting, diarrhea, abdominal pain, and lethargy

Humans: Contains solanine-like alkaloids; ingestion causes mild gastrointestinal upset and oral irritation

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental shrub for night gardens, valued for its nocturnal fragrance and long flowering period