Dudleya brittonii Johanss.
Giant Chalk Dudleya / Britton's Liveforever
Dudleya brittonii, the Giant Chalk Dudleya, is one of the most spectacular succulents in the flora of Baja California (Mexico) and extreme northwestern Baja California Norte. It forms monumental rosettes up to 60 cm across covered in such dense white farina that leaves appear sculpted in plaster. It is the Dudleya species with the highest documented farina density and has been the target of massive illegal poaching for the Asian succulent market.
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Overview
| Category | Classification |
|---|---|
| Family | Crassulaceae |
| Genus | Dudleya |
| Growth Habit | Single, massive, acaulescent to subcaulescent rosette; grows very slowly and can live over 100 years in natural habitat; rarely produces offsets. |
| Conservation Status | No formal IUCN status as a full species, but the massive 2018–2019 poaching event (thousands of plants pulled for export to South Korea and Japan) triggered California emergency federal protections and Mexican measures. In California it is Fully Protected under the Fish and Game Code. |
| pH Target | 6.0 – 7.5 |
| Type | Granitic-gabbroic, escarpment, highly porous, neutral to slightly alkaline; coastal exposure. |
Origin & Habitat
Morphology
Spatulate leaves 15–30 cm long and 4–8 cm wide, covered in the densest white farina in genus Dudleya; underlying color pale green to grey-green; apex acute to acuminate; entire margin. In wild plants farina may reach 1–2 mm thickness.
ecoThick succulent caudex, buried or nearly at ground level; accumulates water and carbohydrate reserves over decades.
ecoInflorescences 30–60 cm; tubular flowers pale yellow to cream, sometimes with pinkish tints; petals connate at base; flowering May to July.
ecoDeep root system for a succulent; main creeping and absorbing roots allowing exploration of deep crevices in granitic and gabbro rock.
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Requirements
Soil & Substrate
Type
Granitic-gabbroic, escarpment, highly porous, neutral to slightly alkaline; coastal exposure.
groups Beneficial Associations
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Propagation Strategy
- 1 Collect ripe seeds in summer; store dry until autumn.
- 2 Fill trays with 70% coarse sand + 30% mineral substrate, no organic matter.
- 3 Surface-sow seeds without covering, or with a very thin layer of silica sand.
- 4 Water by capillary action; place in bright indirect light at 15–20 °C.
- 5 Maintain moderate moisture; germination occurs in 2–4 weeks.
- 6 Prick out seedlings individually when 1–2 cm tall, handling carefully to avoid damaging the pruina.
- 1 Wait for basal offsets to appear during the active season (autumn–spring).
- 2 Detach with a sterile scalpel once the offset is at least 3–4 cm in diameter.
- 3 Allow to callus in a dry, shaded spot for 5–7 days.
- 4 Plant in pure mineral substrate; withhold water until signs of active growth appear.
Water in autumn–winter–spring and keep completely dry in summer — a Mediterranean cycle opposite to most succulents.
Watering in summer: causes fatal root rot within days during summer dormancy.
Every 3–4 years, preferably in autumn at the start of the growing season. Very slow-growing species.
Very sparse fertilization: one dose diluted to 25% of low-nitrogen fertilizer (e.g. 5-10-10) in early autumn and another in mid-winter. Omit entirely in summer.
Uses & Applications
Precautions / Toxicity
No documented toxicity for humans or domestic animals; rosettes not grazed by wild herbivores.
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"The 2018–2019 mass poaching of D. brittonii was one of the largest succulent biopiracy episodes in history: organized bands pulled tens of thousands of plants from cliffs in San Mateo and San Francisco counties for illegal sale in Seoul and Tokyo markets. The FBI became involved in the investigation, and sentences of up to 3 years imprisonment were established."
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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.