Bowiea volubilis Harv. ex Hook.f.
Climbing onion
Extraordinary bulbous geophyte from southern and eastern Africa whose green, photosynthesizing bulb remains fully exposed above the substrate. During the growing season it produces a dense tangle of very slender, twining, highly branched stems that can reach over 2 m in length. It is one of the most fascinating plants for succulent and caudiciform collectors due to its singular life strategy.
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© Nick Helme / iNaturalist
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Overview
| Category | Classification |
|---|---|
| Family | Asparagaceae |
| Genus | Bowiea |
| Growth Habit | Climbing geophyte with exposed bulb; winter-growing, summer-dormant |
| Conservation Status | Least Concern (LC) — IUCN |
| pH Target | 6.0–7.5 |
| Type | Sandy-mineral, very well drained |
Origin & Habitat
Requirements
Soil & Substrate
Type
Sandy-mineral, very well drained
groups Beneficial Associations
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Propagation Strategy
P
B
Every 3–4 years or when the bulb outgrows the pot
Low-nitrogen, high-potassium fertilizer once a month in winter; none in summer
Uses & Applications
Precautions / Toxicity
HIGHLY TOXIC. Contains Scilliroside and bufadienolide glycosides that affect the cardiovascular system. Dangerous to humans, dogs and cats. Prolonged contact with the sap can cause dermatitis. NEVER ingest any part of the plant.
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Plant Health
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"The bulb must always remain exposed; burying it causes rot. During summer dormancy stop watering completely. The stems are deciduous: they dry up at the end of the season and resprout from the bulb at the start of the next cycle."
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Scientific Integrity
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Sources
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Discussion
Disclaimer
This species record is provided for educational and informational purposes only. Jardín Roca Negra does not guarantee the accuracy or completeness of the data. Content is community-curated and may be subject to revision; it should not replace advice from a qualified botanist. This species may be toxic, invasive, or subject to legal restrictions — verify before handling or cultivating. Jardín Roca Negra accepts no liability for any harm arising from reliance on this information. Images are reproduced under Creative Commons or equivalent free licenses; credits are noted below each image.