Cast Iron Plant — Growing reference
| Scientific name | Aspidistra elatior |
|---|---|
| Seed germination (days) | 30–90 |
| Soil temperature for germination (°C) | 18.3–23.9 |
| First harvest or flowering (days) | 365–730 |
| Measured from | Transplant |
| Plant spacing (cm) | 45.7–61 |
| Mature height (cm) | 45.7–91.4 |
| Mature spread (cm) | 61–91.4 |
| USDA hardiness zones | 7–11 |
| Light | Shade |
| Water | Low |
| Sowing method | Division |
Growing directions
Plant rhizome divisions in well-drained, humus-rich soil in deep shade to partial shade; cast iron plant thrives in conditions that defeat nearly every other ornamental, including dense root competition under established trees, poor drainage, and near-zero indoor light. The broad, glossy, deep-green strap leaves grow slowly but are extraordinarily long-lived and require almost no maintenance beyond the occasional removal of damaged foliage. Water sparingly once established — the rhizomes store moisture and rot in permanently waterlogged soil — and fertilize lightly once or twice per year with a balanced slow-release fertilizer. Divide congested clumps in early spring every 5–10 years to maintain vigor.
Source and local conditions
Typical planning ranges from OpenPlantDB (CC0). Cultivar, climate, season and growing method can change these values. Confirm the seed label and local guidance before planting.
Source & verification
OpenPlantDB · CC0