Graptopetalum amethystinum (Rose) E.Walther
Lavender Pebbles
Graptopetalum amethystinum, known as 'Lavender Pebbles', is a compact succulent native to the Mexican state of Jalisco, prized for its rounded, fleshy leaves in an intense lavender-pink hue that resemble precious stones. Its short, dense rosettes on stubby stems distinguish it from other species in the genus, giving it a chunky, elegant appearance. It is a highly sought collector's plant for its unusual coloration and ease of care.
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© Stan Shebs (UC Botanical Garden)
CC BY-SA 3.0
Overview
| Category | Classification |
|---|---|
| Family | Crassulaceae |
| Genus | Graptopetalum |
| Growth Habit | Compact, short rosettes on thickened stubby stems; slow growth, may branch from the base over time. |
| Conservation Status | Not globally threatened. Widely propagated in cultivation; purchasing nursery-grown specimens is recommended to avoid pressure on wild Jalisco populations. |
| pH Target | 6.0 – 7.0 |
| Type | Very porous mineral substrate: mix of cactus soil, perlite, and quartz sand in equal parts. Immediate drainage is essential. |
Origin & Habitat
Morphology
Very fleshy, ovoid to obovate leaves, 2–4 cm, with a rounded apex and farina in intense lavender to rosy-purple hues. The epidermis is smooth with a pearlescent sheen under intense light.
ecoSmall 5-petaled flowers, white to pale pink with red spotting, grouped in cymes on a 10–20 cm floral scape. Blooms in spring.
ecoShort, thickened stems, greyish-purplish, that become more visible with age as lower leaves drop. Tend to produce basal branches.
ecoFibrous, shallow roots; require well-drained substrate. The plant tolerates prolonged drought periods thanks to reserves in its leaves.
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Requirements
Soil & Substrate
Type
Very porous mineral substrate: mix of cactus soil, perlite, and quartz sand in equal parts. Immediate drainage is essential.
groups Beneficial Associations
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Propagation Strategy
- 1 Detach a healthy leaf by gently twisting to obtain it intact with its base.
- 2 Let the cut end dry for 2–3 days in a warm, airy place until a callus forms.
- 3 Lay the leaf horizontally on dry substrate; do not bury.
- 4 Mist the base every 3–4 days; roots and plantlets will emerge in 4–8 weeks.
- 1 Locate basal offsets at least 2–3 cm in size.
- 2 Separate with a sterilized blade, trying to include any existing roots.
- 3 Dry the cut for 1–2 days and plant in slightly moist substrate.
- 4 Avoid watering for the first 5 days to encourage rooting.
Expose to full sun in summer to intensify the lavender-purple coloration; the plant is most vibrant with some controlled water stress.
Overwatering thinking the lavender color indicates negative water stress; it is a natural characteristic.
Every 2–3 years in spring when roots appear through the drainage hole.
Half-strength cactus fertilizer once a month from April to August; none in autumn and winter.
Uses & Applications
Precautions / Toxicity
Non-toxic to humans, dogs, and cats. Safe plant for homes with pets.
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Plant Health
Mealybugs (Planococcus citri): cottony white colonies in leaf axils; remove with an alcohol-soaked swab or apply systemic insecticide.
Root rot from overwatering; leaves become soft and translucent and the stem darkens from the base.
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"The name 'amethystinum' directly references amethyst quartz, reflecting the extraordinary violet color of its leaves; this pigmentation intensifies with water stress and intense sun exposure, a common photoprotective mechanism in Crassulaceae."
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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.