Raoulia eximia
Raoulia eximia
Raoulia eximia, commonly known as vegetable sheep, is a remarkable alpine cushion plant native to New Zealand. Its dense, woolly appearance from a distance gives it its common name, as early settlers mistook clusters of these plants for sheep grazing on mountainsides. This fascinating plant forms compact, silver-white mounds that are perfectly adapted to harsh alpine conditions.
Image credit: Wikipedia
Quick Facts
| Height | 10-30 cm |
|---|---|
| Water Needs | Low |
| Light | Full sun |
| Frost Tolerance | Very High |
| Growth Rate | Very Slow |
| Lifespan | Long-lived perennial |
Climate Best Suited To
Raoulia eximia is naturally adapted to alpine environments with extreme conditions. It thrives in areas with high exposure, cold temperatures, and excellent drainage. In cultivation, it requires similar conditions to succeed.
| City | Climate Suitability |
|---|---|
| Whangārei | Challenging |
| Auckland | Challenging |
| Hamilton | Challenging |
| Rotorua | Moderate |
| Gisborne | Challenging |
| New Plymouth | Challenging |
| Napier | Challenging |
| Wellington | Moderate |
| Nelson | Moderate |
| Christchurch | Ideal |
| Dunedin | Ideal |
| Invercargill | Ideal |
Growing Requirements
Soil Requirements
Raoulia eximia requires:
- Very well-draining, gritty soil
- Rocky or sandy substrate
- Low organic matter content
- Slightly acidic to neutral pH
Light Requirements
This alpine plant needs:
- Full sun exposure
- High light intensity
- Good air circulation
- Protection from afternoon heat in warmer regions
Water Requirements
Water needs include:
- Excellent drainage essential
- Moderate water in growing season
- Very little water in winter
- Protection from winter wet
Natural Habitat
Where Found
Raoulia eximia naturally occurs in:
- Alpine and subalpine zones (1000-2000m)
- Rocky outcrops and scree slopes
- Areas with high wind exposure
- Well-drained mountain slopes
Growing Conditions
- Exposed to full sun and strong winds
- Subject to snow cover in winter
- Experiences extreme temperature fluctuations
- Growing in mineral-poor substrates
Propagation
From Seed
- Collect seeds when ripe in late summer
- Sow fresh in autumn or spring
- Use well-draining alpine mix
- Keep cool and moist until germination
Division
- Carefully divide established plants in spring
- Ensure each division has roots
- Plant in gritty, well-draining mix
- Keep moist until established
Ecological Significance
Raoulia eximia plays important roles in alpine ecosystems:
Ecosystem Functions
- Soil stabilization on mountain slopes
- Microhabitat creation for invertebrates
- Pioneer species in harsh environments
- Indicator of alpine ecosystem health
Adaptations
- Dense growth form for wind protection
- Woolly covering reflects intense sunlight
- Deep roots for stability
- Efficient water conservation
Conservation Considerations
Threats
- Climate Change: Warming temperatures may affect alpine habitat
- Tourism Impact: Trampling in popular alpine areas
- Habitat Loss: Development in alpine regions
- Collection: Unauthorized removal from wild populations
While currently not threatened, Raoulia eximia requires protection of its alpine habitat for long-term survival.
Bonus Tip
For successful cultivation in lowland gardens, create a raised rock garden with sharp drainage and use gravel mulch to replicate the plant's natural alpine habitat. Position where it will receive maximum light but protection from excessive summer heat.
