Crassula tetragona L.
Miniature Pine Tree
Crassula tetragona, known as the "miniature pine tree" for its striking resemblance to a young pine, is a shrubby succulent native to southern and southwestern South Africa. Its dark green linear leaves, arranged opposite and perpendicular to the branches, create a three-dimensional pattern that remarkably evokes conifer needles. It is one of the few crassulas with a clearly tree-like appearance frequently used in bonsai.
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© Derek Ramsey
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Overview
| Category | Classification |
|---|---|
| Family | Crassulaceae |
| Genus | Crassula |
| Growth Habit | Erect shrubby succulent |
| Conservation Status | Least Concern |
| pH Target | 6.0 – 7.0 |
| Type | Well-drained sandy loam; inorganic soil for bonsai cultivation |
Origin & Habitat
Morphology
Linear to subulate leaves, 1.5–4 cm long and less than 3 mm wide, dark to deep shiny green, arranged in opposite pairs perpendicular to each other on the stem. Although they resemble pine needles, they are succulent leaves with well-developed water storage tissues.
ecoErect stems, initially soft and green, becoming woody and grey with age, branching alternately at near-right angles to create the tree appearance. Mature specimens form a defined trunk with brownish bark and a well-structured crown.
ecoWhite to cream, very small (3–5 mm), star-shaped flowers produced in terminal corymbs during spring and summer. They are visually modest but fragrant; in cultivation, flowering requires a mature plant and some controlled water stress.
ecoFibrous root system with relatively shallow roots that adapt well to shallow containers, making it especially suitable for bonsai cultivation. The roots do not tolerate excess moisture.
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Requirements
Soil & Substrate
Type
Well-drained sandy loam; inorganic soil for bonsai cultivation
groups Beneficial Associations
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Propagation Strategy
- 1 Cut an upright stem 8–12 cm long with sterilised scissors; the opposite arrangement of needle-like leaves makes node identification easy.
- 2 Carefully remove the needle-like leaves from the lower third without damaging the stem.
- 3 Allow to cure in shade for 2–3 days.
- 4 Plant vertically in cactus mix with perlite; the upright form makes the cutting very stable.
- 5 Water lightly and place in full sun or very bright light.
- 1 C. tetragona forms groups of upright stems; remove the plant and separate individual rooted stems.
- 2 Plant each rooted stem in its own pot with cactus mix.
- 3 Water immediately and place in full light.
The miniature pine appearance with opposite needle-like leaves makes it unique; provide full sun to maintain compact form and prevent stretching.
Growing in low light, causing the upright stems to stretch disproportionately and lose the 'miniature pine' appearance.
Repot every 2 years in spring. Being upright and relatively fast-growing, it may need taller rather than wider pots to stabilise the stem.
Fertilise once a month in spring and summer with liquid succulent fertiliser at 50% dose. No fertilisation in autumn and winter.
Uses & Applications
Precautions / Toxicity
No significant toxicity reported for humans or domestic animals at normal contact levels.
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"The linear leaf morphotype of C. tetragona is a remarkable example of evolutionary convergence with conifers: both groups independently developed narrow leaves as an adaptive response to reduce transpiration surface area, although the biochemical mechanisms are completely different."
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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.