When to Plant Celeriac in Cairns, Tropical Guide

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

Planting window
Celeriac is extremely difficult in tropical climates. The 120+ day growing season and need for cool conditions makes it impractical. If...
Days to harvest
about 17 weeks
Sunlight
Full sun to part shade (3-6 hours). Tolerates more shade than most root crops. In warmer zones, afternoon shade is beneficial.
Water needs
Celeriac demands consistent, generous moisture throughout its long growing season. Never...
Spacing
30cm apart, 45cm between rows
Soil pH
6.0-7.0

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

This Celeriac guide is written for the Tropical zone, which takes in Cairns, Townsville and Darwin. Somewhere else? Your postcode picks the right one.

Not your zone? Brisbane Sydney Melbourne Canberra Alice Springs Perth

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

Celeriac

Photo: Wikimedia Commons

Celeriac is an underappreciated root vegetable that deserves more attention in Australian gardens. It produces a large, knobby, celery-flavoured root that is outstanding roasted, mashed, or in soups. It requires patience (120+ days), consistent moisture, and rich soil, making it a more advanced crop. Best suited to cool-temperate and cold-highland zones; struggles in tropical and subtropical heat.

Planting Calendar for Tropical

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

S = Seed Tray   T = Transplant   D = Direct Sow

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Current Growing Conditions

Soil temperature: 21.3°C (optimal range: 15–21°C) ✗ Outside optimal range

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

How to Grow Celeriac in Tropical Australia

When to Plant

Celeriac is extremely difficult in tropical climates. The 120+ day growing season and need for cool conditions makes it impractical. If attempted, grow only in the dry season (May-August) in elevation or with significant cooling measures.

Soil
Rich, deep, moisture-retentive soil heavily amended with compost and well-rotted manure. Celeriac is a heavy feeder and demands fertile, humus-rich soil. Tolerates heavier soils than most root vegetables.
pH Range
6.0-7.0
Sunlight
Full sun to part shade (3-6 hours). Tolerates more shade than most root crops. In warmer zones, afternoon shade is beneficial.
Spacing
30cm apart, 45cm between rows
Watering
Celeriac demands consistent, generous moisture throughout its long growing season. Never let soil dry out. Water deeply 3-4 times per week. Drip irrigation ideal. Dry stress causes woody, hollow...

Companion plants: Leek, Bean, Tomato, Cabbage, Cauliflower

Avoid planting near: Carrot, Parsnip (shares diseases), Corn

Tropical Growing Tips for Celeriac

Recommended Varieties

  • Not recommended for tropical zones

Key Challenges

  • Heat stress causing bolting
  • 120+ day season doesn't fit tropical dry season window
  • Fungal diseases in humidity
  • Insufficient cool weather for root development

Pro Tips

  • Honestly, grow something else. Celeriac needs cool conditions that FNQ cannot provide
  • If you must try: grow in pots on a shaded verandah with evaporative cooling
  • Consider celery as an alternative. Shorter season and somewhat more heat tolerant

Harvesting Celeriac

When ready: Root is 10-15cm diameter, visible above soil surface. Outer leaves begin to yellow and fall. Typically 120-150 days from transplant. Root should feel firm and heavy.

How to harvest: Use a garden fork to lever out the root. Cut off leaves and side roots. Trim the base. Do not wash if storing. The root should be the size of a large grapefruit or softball.

Where to next

Also worth sowing in the tropical zone this September: Lemongrass, Ginger, Cucumber and Basil.

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Common Questions About Celeriac

When do you plant celeriac in Australia?

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

Does celeriac grow all year round in Cairns?

No. In the Tropical zone the planting months are Apr, 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 Tropical zone, Cairns is its reference city.