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Vegetable · Easy to grow

Radish

Raphanus sativus

The fastest crop in the garden, with round radishes ready in about 4 weeks. Sow seed directly almost all year in Adelaide, avoiding the hottest weeks when they get hot and pithy. Keep moist and pick on time; left too long they turn woody and split.

When to plant where you live

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Planting times for other areas

Varieties (3)

  • Cherry BelleRound red radish ready in about 4 weeks; the classic quick crop
  • Daikon (e.g. Japanese Minowase)Long white winter radish for cooking and pickling; needs 8 weeks or more
  • French BreakfastOblong red-and-white, mild and crisp

Neighbours

Grows well with

From seed to plate

  1. Plant

    5 cm apart, seed 10 mm deep. Full sun.

  2. Water

    Even moisture or they go woody.

  3. Feed

    None needed.

  4. Pick, from about 4 weeks

    Pull promptly.

Good to know

  • Sow a small batch every 2 weeks
  • Mix with slow carrot or parsnip seed to mark rows
  • Radish seed pods are edible too if plants bolt

Common problems

  • Hot, pithy or split rootswater evenly and harvest promptly; avoid summer sowings
  • Cabbage white caterpillars and flea beetle holescover with fine insect mesh
  • All leaf, no rootthin to 3 to 5 cm and avoid too much nitrogen

If you use a garden chemical, follow the label exactly. Try organic options first, and ask the community or Plant Doctor if you're unsure.

Ask the garden helper about radishAny question, answered from the plant libraryHow others are growing radishQuestions, tips and harvests from the community

Guides

Where this information comes from

Reviewed by AI cross-check (Claude), not a horticulturist on 27 Oct 2026. Version 2.