When to Plant Horseradish in Alice Springs, Arid / Semi-Arid Guide

Sow June to July. Right now in September it is out of season. The next sowing month is June.

Published · Last reviewed · By Garden Buddy
Growing advice is reviewed by hand. Planting dates, current conditions and prices on this page update daily.

This Horseradish guide is written for the Arid / Semi-Arid zone, which takes in Alice Springs, Broken Hill and Port Augusta. Somewhere else? Your postcode picks the right one.

Not your zone? Cairns Brisbane Sydney Melbourne Canberra Perth

Also handy: will it frost this week? and what grows in shade.

Horseradish

Photo: Wikimedia Commons

Horseradish is a robust, hardy perennial grown for its pungent root. Once established, it is almost impossible to eradicate. A feature or a bug depending on your perspective. Best suited to temperate and cool climates where cold winters develop the best-flavoured roots. Extremely low maintenance but must be contained or it will take over the garden.

Planting Calendar for Arid / Semi-Arid

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
- - - - - D D - - - - -

S = Seed Tray   T = Transplant   D = Direct Sow

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Current Growing Conditions

Soil temperature: 22.7°C (optimal range: 10–25°C) ✓ Ready to plant

Modelled from Open-Meteo forecast (Alice Springs), not a live sensor.

How to Grow Horseradish in Arid / Semi-Arid Australia

When to Plant

Plant in autumn or spring. Needs irrigation through dry periods. Cold desert nights help develop root pungency.

Soil
Deep, loose, well-drained soil enriched with organic matter. Best roots form in sandy loam or loam dug to at least 30cm depth. Tolerates a wide range of soils but heavy clay produces misshapen roots. Remove stones.
pH Range
6.0-7.5
Sunlight
Full sun (6+ hours). Tolerates partial shade but root development is reduced.
Spacing
40cm apart, 60cm between rows
Watering
Moderate water needs. Water deeply once per week during active growth. Drought tolerant once established but consistent moisture produces the best roots. Reduce watering in winter when dormant.

Companion plants: Potato, Fruit trees, Grape vines

Avoid planting near: Other brassicas (shares diseases)

Arid / Semi-Arid Growing Tips for Horseradish

Recommended Varieties

  • Common Horseradish

Key Challenges

  • Water requirements in dry conditions
  • Less invasive due to heat/drought but still persistent

Pro Tips

  • Arid zones with cold winters can produce good horseradish
  • Drip irrigation essential through summer
  • Heavy mulching to keep roots cool and moist

Harvesting Horseradish

When ready: Harvest after the first frosts of autumn/winter, or at least 16-24 weeks after planting. Roots should be at least 30cm long and 3-5cm diameter at the crown. Leaves may have died back partially in cold climates.

How to harvest: Dig deeply alongside the root with a garden fork. Roots can go 60cm+ deep. Lever out carefully. Any root fragment left in soil WILL regrow, so be thorough if you want to contain the plant. Snap off side roots for replanting or discard in bin (not compost).

Where to next

Also worth sowing in the arid and semi-arid zone this September: Ginger, Chilli Peppers, Lemongrass and Beetroot.

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Common Questions About Horseradish

When do you plant horseradish in Australia?

It depends on your climate zone, not the calendar month alone. Planting months by zone:

Does horseradish grow all year round in Alice Springs?

No. In the Arid / Semi-Arid zone the planting months are Jun to Jul. Outside that window it either bolts, sulks or gets cut down by the weather.

Which zone am I in?

Type your postcode into the box under the heading and the page tells you, and links this crop in your own zone if it differs. Or look it up on the grow zone map. This page is the Arid / Semi-Arid zone, Alice Springs is its reference city.