When to Plant Daikon in Brisbane — Subtropical Guide

Daikon

Photo: Wikimedia Commons

Daikon is a large, mild-flavoured Asian radish that has become increasingly popular in Australian home gardens. It grows fast (60-70 days), breaks up compacted soil with its deep taproot, and is excellent both as a food crop and green manure. Easier to grow than many root vegetables, it thrives in cooler months across all Australian zones.

Current Growing Conditions

Soil temperature: 23.6°C (optimal range: 10–20°C) ✗ Outside optimal range

How to Grow Daikon in Subtropical Australia

When to Plant

February to August. Autumn sowings (March-May) are most reliable. Bolts in October onwards.

Soil
Deep, loose, well-drained soil free of stones. Daikon roots can grow 30-60cm long, so soil must be deeply prepared. Sandy loam is ideal. In heavy clay, grow in raised beds at least 40cm deep or choose shorter varieties like Alpine.
pH Range
6.0-7.0
Sunlight
Full sun (6+ hours). Tolerates light shade.
Spacing
25cm apart, 45cm between rows
Watering
Even, consistent moisture throughout growth. Water deeply 2-3 times per week. Inconsistent watering causes cracking and pithy (hollow) roots. Reduce slightly in last week before harvest.

Companion plants: Lettuce, Spinach, Peas, Beans, Cucumber

Avoid planting near: Other brassicas (shares diseases), Strawberry

Subtropical Growing Tips for Daikon

Recommended Varieties

  • Mino Early
  • April Cross
  • Tokinashi
  • Alpine (short variety for heavy soils)

Key Challenges

  • Bolting in warm spring weather
  • Cabbage white butterfly year-round
  • Clubroot in acidic SEQ soils

Pro Tips

  • Autumn is your window - sow March-May for reliable crops
  • Net against cabbage white butterfly from day one
  • Lime acidic SEQ soils well before planting (pH test first)

Harvesting Daikon

When ready: Root shoulders 5-8cm diameter, visible above soil. Typically 60-70 days from sowing. Pull one test root. Root should be firm, white, and crisp. Pithy or hollow centre means overmaturity.

How to harvest: Loosen soil deeply alongside the root with a garden fork before pulling - daikon roots can be 30-60cm long and will snap if forced. Grasp at the crown and lift steadily. Do not twist.

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