Aloe barberae Dyer
Giant tree aloe
Aloe barberae is the world's largest Aloe species, reaching up to 18 m in height with trunks up to 90 cm in diameter. Its imposing canopy branches at the upper end with clusters of pink flowers in winter that feed large numbers of birds and insects. In South Africa it is a protected species and an emblematic natural heritage of the eastern coast.
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Overview
| Category | Classification |
|---|---|
| Family | Asphodelaceae |
| Genus | Aloe |
| Growth Habit | Large succulent tree, branched at the crown |
| Conservation Status | Least Concern (protected in South Africa) |
| pH Target | 6.0–7.5 |
| Type | Loam to rocky, well-drained soil |
Origin & Habitat
Morphology
Lanceolate leaves 60–90 cm long, glaucous grey-green, with small marginal teeth, arranged in terminal rosettes at the end of each branch.
ecoRobust fibrous trunk up to 90 cm in diameter, grey-brown, with rough bark texture and marks of fallen leaves.
ecoTubular flowers 3–4 cm long, pink to pinkish-red, in branched racemes on peduncles up to 60 cm. Flowering May–August.
ecoDeep and extensive root system capable of anchoring the tree in rocky soils and withstanding coastal winds.
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Requirements
Soil & Substrate
Type
Loam to rocky, well-drained soil
groups Beneficial Associations
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Propagation Strategy
- 1 Sow fresh seeds in sandy substrate at 22–26 °C.
- 2 Keep moist and shaded until germination (2–4 weeks).
- 3 Transplant seedlings individually at 5–8 cm.
- 4 Slow growth: 2–3 years to reach 30 cm.
- 1 Cut a 40–60 cm terminal branch with a clean saw.
- 2 Allow the cut to dry for 5–7 days in a warm, dry place.
- 3 Plant in well-draining substrate, burying 15 cm.
- 4 Water monthly; they root in 3–5 months.
Very slow-growing species; plan decades ahead for garden planting.
Overwatering in the first years, causing base rot.
Every 3–5 years when young; then into permanent ground position
Slow-release organic granular fertilizer, once a year in spring
Uses & Applications
Precautions / Toxicity
Leaves contain latex with anthraquinones; moderately toxic if ingested.
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"A. barberae was originally described as Aloe bainesii and renamed in honour of botanist Mary Elizabeth Barber; the oldest known specimen in cultivation was planted at Kirstenbosch Gardens in 1913 and exceeds 12 m today."
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Scientific Integrity
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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.