When to Plant Fennel (herb) in Sydney — Warm Temperate Guide
Photo: Wikimedia Commons
Herb fennel (common fennel) is a tall, feathery perennial grown for its anise-flavoured leaves, stems and seeds. NOT the same as Florence/bulb fennel (F. vulgare var. azoricum). Herb fennel is hardy, drought-tolerant, and can become a large landscape plant reaching 1.5-2m. Considered a weed in parts of Australia - grow responsibly.
Current Growing Conditions
Soil temperature: 19.3°C (optimal range: 10–25°C) ✓ Ready to plant
How to Grow Fennel (herb) in Warm Temperate Australia
When to Plant
Sow Aug-Oct. Perennial once established.
- Soil
- Any well-drained soil. Tolerant of poor soils. Drought tolerant once established.
- pH Range
- 5.5-7.0
- Sunlight
- Full sun.
- Spacing
- 30cm apart, 60cm between rows
- Watering
- Low water needs once established. Water regularly when young. Very drought tolerant as a perennial.
Companion plants: Dill (distant), Sage
Avoid planting near: Tomato, Bean, Capsicum, Coriander - fennel is allelopathic and inhibits growth of many vegetables
Warm Temperate Growing Tips for Fennel (herb)
Recommended Varieties
- Common fennel
- Bronze fennel
Key Challenges
- Weed potential
- Allelopathic effects on nearby plants
Pro Tips
- Grow in dedicated herb bed away from vegetables
- Harvest seeds to prevent self-sowing
- Cut back hard in late winter for fresh spring growth
Harvesting Fennel (herb)
When ready: Harvest leaves anytime once plant is established. Seeds ready when brown on plant.
How to harvest: Snip feathery fronds as needed. Cut seed heads when brown and dry in paper bags. Harvest young stems for cooking.
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