Aloe marlothii A.Berger
Mountain aloe
Iconic mountain aloe reaching up to 6 metres in height, forming a robust trunk covered by a skirt of dead leaves. Its orange flowers appear in horizontal clusters that attract nectar-feeding birds during the South African winter. It is one of the most recognisable aloe species in South Africa.
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Overview
| Category | Classification |
|---|---|
| Family | Asphodelaceae |
| Genus | Aloe |
| Growth Habit | Solitary arborescent |
| Conservation Status | Least Concern (LC) — IUCN |
| pH Target | 6.0–7.5 |
| Type | Rocky, sandy, well-drained |
Origin & Habitat
Morphology
Long, lanceolate leaves, greyish-green with faint spots on juvenile plants, margins with robust reddish-brown spines. Can reach 1.5 m in length in adult specimens.
ecoSolitary, erect trunk that can exceed 6 m in height, with a considerable base diameter. Covered by a characteristic skirt of persistent dry leaves.
ecoPaniculate inflorescences with numerous horizontal branches bearing tubular orange to orange-red flowers. Flowering during the austral winter (June–August).
ecoDeep and spreading root system that anchors the trunk in rocky hillside soils. Thick and fibrous roots.
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Requirements
Soil & Substrate
Type
Rocky, sandy, well-drained
groups Beneficial Associations
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Propagation Strategy
- 1 Sow in sandy, well-drained substrate.
- 2 Keep slightly moist at 22–26 °C.
- 3 Germination in 2–4 weeks.
- 4 Transplant seedlings when they reach 5 cm in height.
Plant in rocky or very well-drained soils.
Overwatering causes rot at the base of the trunk.
Only during juvenile stages; once established it does not require repotting.
Minimal fertilisation; apply balanced fertiliser once a year in spring.
Uses & Applications
Precautions / Toxicity
Mildly toxic to pets if ingested in large quantities.
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"One of the most spectacular aloe species in South Africa, often used as an anchor species in local wildlife conservation gardens."
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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.