Hawaiian Baby Woodrose (Argyreia nervosa)

Hawaiian Baby Woodrose

Argyreia nervosa

Its trumpet blooms unfurl like pink silk at dawn, clinging to sunlit trellises. Woody perennial vine; common name: Hawaiian Baby Woodrose.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Requires 6–8 hours of daily direct sunlight for abundant flowering; tolerate partial shade during midday in extremely hot climates to prevent leaf scorch
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Watering Water thoroughly when the top 5 cm of soil feels dry; avoid overwatering to prevent root rot and fungal growth
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Temperature Thrives in 18–30°C; protect from temperatures below 10°C as it is not cold-hardy and will suffer leaf damage or dieback in frost
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Characteristics

  • Leaf: Large heart-shaped, velvety green foliage with prominent, raised venation; reaches up to 20 cm in length
  • Flower: Fragrant trumpet-shaped blooms, pale pink to creamy white, measuring up to 8 cm across
  • Stem: Hairy, woody twining stems with small aerial rootlets for anchoring to supports
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Care Guide

Watering

Keep soil evenly moist but not saturated; increase watering frequency during prolonged hot, dry spells

Fertilization

Apply diluted balanced liquid fertilizer every 2 weeks. Cease fertilization during winter when growth enters dormancy

Composted banana peel tea:Soak fully composted banana peels in water for 3 days; dilute the tea 1:20 with water before applying as a root drench to avoid nutrient burn
Pruning
  • Trim overgrown or tangled stems in early spring to encourage bushier growth and better flowering
  • Remove dead, yellowing, or diseased foliage regularly to maintain airflow and reduce pest risk
  • Tie climbing stems to trellises or supports to guide growth and prevent tangling
  • Cut back spent flower heads to promote continuous blooming throughout the growing season
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion leads to vomiting, diarrhea, tremors, increased heart rate, and disorientation

Humans: Contains ergoline alkaloids in seeds; ingestion causes hallucinations, nausea, elevated blood pressure, and potential seizures in severe cases

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Garden Uses & Culture

Culture: Seeds have historical use in traditional South Asian medicine and ritual practices, though their psychoactive properties are regulated in most regions

Usage: Ornamental climbing vine for trellises, arbors, and wall coverings; seeds are psychoactive and legally restricted in many countries