Jerusalem Artichoke — Growing reference
| Scientific name | Helianthus tuberosus |
|---|---|
| Seed germination (days) | 14–21 |
| Soil temperature for germination (°C) | 10–18.3 |
| First harvest or flowering (days) | 120–150 |
| Measured from | Transplant |
| Plant spacing (cm) | 30.5–45.7 |
| Mature height (cm) | 182.9–304.8 |
| Mature spread (cm) | 45.7–91.4 |
| USDA hardiness zones | 3–9 |
| Light | Full sun |
| Water | Low |
| Sowing method | Tuber |
Growing directions
Plant tuber sections 3–5 inches deep around the last frost date in any well-drained soil — Jerusalem artichoke is remarkably tolerant of poor soils, drought, and neglect, producing masses of crunchy, nutty, sweet tubers in autumn that can be harvested after frost improves their flavor by converting inulin to sugars. The plants reach 6–10 feet tall and produce small yellow sunflowers in late summer. Harvest tubers from fall through early spring by digging; leave some tubers in the ground to re-sprout and produce next year's crop. Note that inulin is not digested by most people and can cause significant gas — start with small servings and cook thoroughly to reduce this effect.
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