Aloe erinacea D.S.Hardy
Hedgehog aloe
Aloe erinacea is one of the most visually impressive aloes for its spherical rosette densely armed with rigid white spines with dark tips completely covering the leaf surface on both sides, giving the plant the appearance of a giant hedgehog. Native to the quartz plains of the Richtersveld and the Gariep region of Namibia, it is perfectly adapted to hyper-arid conditions with rainfall below 50 mm annually.
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Overview
| Category | Classification |
|---|---|
| Family | Asphodelaceae |
| Genus | Aloe |
| Growth Habit | Compact spherical rosette, very dense and armed |
| Conservation Status | Vulnerable |
| pH Target | 6.5–7.5 |
| Type | Pure quartz, mineral gravel completely free of organic matter |
Origin & Habitat
Morphology
Lanceolate leaves 8–15 cm long, grey-green, completely covered on both surfaces by rigid white spines 5–15 mm with brown tips, without differentiated margin.
ecoNo apparent stem; the spherical rosette 20–35 cm in diameter grows at the level of the quartz ground.
ecoTubular flowers 2.5–3 cm long, orange-red, in simple racemes on erect peduncles 40–60 cm tall. Flowering in the austral summer.
ecoThick storage roots, adapted to storing water from the very scarce rains and fogs of the Richtersveld.
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Requirements
Soil & Substrate
Type
Pure quartz, mineral gravel completely free of organic matter
groups Beneficial Associations
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Propagation Strategy
- 1 Sow in pure crushed quartz at 24–30 °C under intense light.
- 2 Moisten once with a very fine spray at sowing; do not water again until germination.
- 3 Germination in 3–8 weeks; seedlings grow extremely slowly.
- 4 Do not transplant before the second year; roots are very fragile in seedlings.
- 1 Offsets are rare; separate only when they have visible own roots.
- 2 Allow to callus for 4–6 days in a very dry and hot environment.
- 3 Plant in pure quartz; do not water at all for the first 4 weeks.
- 4 Root in 8–12 weeks if conditions are warm and dry.
Overhead watering is strictly prohibited; it causes rot between the spines.
Watering by overhead spray, causing rot between the dense spines.
Every 5–7 years; always handle with thick anti-spine gloves
No fertilisation; any fertilizer may cause root burns in this species
Uses & Applications
Precautions / Toxicity
Toxic if ingested; spines are a real physical hazard. Handle only with thick gloves.
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"The spines on both leaf surfaces of A. erinacea are morphologically homologous to those other aloes bear only on the margin; this total spine covering has been interpreted as an extreme herbivore defence and solar radiation reflector, but its role in fog condensation and utilisation of dew as a water source in the Richtersveld is an active area of research."
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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.