When to Plant Jerusalem Artichoke in Sydney — Warm Temperate Guide
Photo: Wikimedia Commons
Jerusalem artichokes (sunchokes) are one of the easiest and most productive root vegetables for Australian gardens. A perennial sunflower relative that produces knobby, nutty-flavoured tubers underground. Virtually indestructible once established, producing heavy crops with almost zero maintenance. The catch: they are notoriously invasive, and the inulin they contain causes flatulence in many people. Plan your planting site carefully.
Current Growing Conditions
Soil temperature: 19.3°C (optimal range: 6–25°C) ✓ Ready to plant
How to Grow Jerusalem Artichoke in Warm Temperate Australia
When to Plant
August to September. Plant in late winter/early spring. Harvest May-August after tops die back.
- Soil
- Tolerates almost any soil but produces best tubers in loose, well-drained soil with moderate organic matter. Thrives in sandy loam to clay loam. Grows in poor soils where other crops fail. Deep soil produces larger tubers.
- pH Range
- 5.8-7.5
- Sunlight
- Full sun (6+ hours). Tolerates partial shade but tuber production is reduced. Plants grow 2-3m tall and can shade other crops.
- Spacing
- 35cm apart, 60cm between rows
- Watering
- Drought tolerant once established. Water regularly during tuber formation (summer-autumn) for larger yields. Weekly deep watering in dry spells. Overwatering is rarely an issue.
Companion plants: Corn (similar height/culture), Sunflower, Pumpkin
Avoid planting near: Low-growing crops that will be shaded (lettuce, strawberry)
Warm Temperate Growing Tips for Jerusalem Artichoke
Recommended Varieties
- Fuseau
- Dwarf Sunray
- Common
Key Challenges
- Invasiveness - the main challenge in Sydney
- Shading other crops with 2-3m stems
- Wind damage in exposed positions
Pro Tips
- Sydney's climate is excellent for Jerusalem artichokes
- CONTAIN THEM. Raised bed with solid walls, or large pots
- Beautiful yellow sunflower-like blooms in March-April are a bonus
Harvesting Jerusalem Artichoke
When ready: Harvest after the stems die back from frost or natural senescence (usually May-June). Tubers are mature when plants have flowered and tops begin to yellow. Approximately 140-150 days from planting.
How to harvest: Cut dead stems to 10cm. Dig carefully with a garden fork, starting well outside the stem base. Tubers spread laterally up to 40cm from the main stem. Any tuber left in the ground WILL regrow - harvest thoroughly if you want to contain the patch.
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