Dioon spinulosum
Giant Dioon
| Family |
| Zamiaceae |
| Genus |
| Dioon |
| Species |
| spinulosum |
| Category |
| Tropicals, Woody |
| Type |
| Shrub (evergreen) |
| USDA Hardiness Zone |
| 9b - 11 |
| Canadian Hardiness Zone |
| 9a and greater |
| RHS Hardiness Zone |
| H1c - H3 |
| Temperature (°C) |
| -5 to 10 |
| Temperature (°F) |
| 23 to 50 |
| Height |
| 5 to 15 m |
| Spread |
| 1.5 to 2 m |
| General Description |
| This cycad is one of the tallest species in its genus. A single trunk supports large, green, leaves that radiate from the centre. |
| Landscape |
| Rock garden, city landscaping, and as a single specimen. |
| Cultivation |
| Grow in moist, gritty, well-drained soil in partial shade. |
| Shape |
| Upright to rounded. |
| Growth |
| Fast |
| Pests |
| No notable pests or diseases. |
| Habitat |
| Limestone cliffs, rocky hillsides, and tropical rainforests. |
| Leaf Description |
| Green, pinnate leaves measuring 1.5 to 2 m radiate from the top of the stem. |
| Notable Specimens |
| Chelsea Physic Garden, London, United Kingdom. |
| Propagation |
| Propagate by seed or division. |