Alocasia — Growing reference
| Scientific name | Alocasia macrorrhiza |
|---|---|
| First harvest or flowering (days) | 60–120 |
| Measured from | Transplant |
| Plant spacing (cm) | 152.4–243.8 |
| Mature height (cm) | 152.4–457.2 |
| Mature spread (cm) | 152.4–304.8 |
| USDA hardiness zones | 9–12 |
| Light | Shade |
| Water | High |
| Sowing method | Division |
Growing directions
Plant in moist, humus-rich, slightly acidic soil in partial to full shade; giant elephant ear is one of the most dramatically bold-textured tropical plants available for zone 9–12 gardens, producing truly enormous, upward-pointing, arrow-shaped leaves — 2–4 feet long — on stout petioles that can reach 6–15 feet tall, creating an unmistakably tropical visual impact that transforms any landscape. Unlike the Colocasia elephant ears (which droop their leaves), Alocasia macrorrhiza holds its leaves upward and outward, creating a distinctive architectural silhouette. It thrives in the bright, filtered shade beneath large trees and palms in the hot, humid Gulf Coast climate, where high moisture, rich soil, and warmth produce the largest, most spectacular plants. The massive rhizomes are edible (raw parts are toxic due to calcium oxalate crystals — must be cooked) and are used as a starchy vegetable in Pacific Island cuisine. Remove damaged leaves promptly and fertilize monthly during the growing season for best growth.
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