When to Plant Carrot in Cairns, Tropical Guide

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

Planting window
March to July only (dry season). Wet season growing is futile. Root rot, leaf diseases, and poor germination. Best sowings are April-May.
Days to harvest
about 10 weeks
Sunlight
Full sun (6+ hours). Tolerates light afternoon shade in hot climates, which can actually improve root quality.
Water needs
Keep soil evenly moist but not waterlogged. Inconsistent watering causes cracking and...
Spacing
5cm apart, 25cm between rows
Soil pH
6.0-6.8
Shop price
$2.45/kg average

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

This Carrot 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.

Carrot

Photo: Wikimedia Commons

Carrots are Australia's most popular root vegetable and one of the most widely grown home garden crops. They demand loose, well-prepared soil and patience with germination but reward growers with sweet, crunchy roots. Direct sowing is essential. Carrots do not transplant. With the right variety selection, carrots can be grown in every Australian climate zone.

Planting Calendar for Tropical

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

S = Seed Tray   T = Transplant   D = Direct Sow

Want a nudge when it is Carrot sowing time in Cairns?

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Current Growing Conditions

Soil temperature: 21.3°C (optimal range: 7–30°C) ✓ Ready to plant

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

How to Grow Carrot in Tropical Australia

When to Plant

March to July only (dry season). Wet season growing is futile. Root rot, leaf diseases, and poor germination. Best sowings are April-May.

Soil
Deep, loose, sandy loam free of stones and clods. The single most important factor for straight carrots is soil preparation. Dig to at least 30cm and remove all rocks. Heavy clay must be heavily amended with coarse sand and compost, or use raised beds. Do NOT add fresh manure. Causes forked, hairy, split roots.
pH Range
6.0-6.8
Sunlight
Full sun (6+ hours). Tolerates light afternoon shade in hot climates, which can actually improve root quality.
Spacing
5cm apart, 25cm between rows
Watering
Keep soil evenly moist but not waterlogged. Inconsistent watering causes cracking and splitting. Water deeply 2-3 times per week. Reduce watering slightly in the last 2 weeks before harvest to...

Companion plants: Spring Onion, Leek, Rosemary, Sage, Chive, Lettuce

Avoid planting near: Dill, Parsnip, Celery (shares diseases), Fennel

Tropical Growing Tips for Carrot

Recommended Varieties

  • Kuroda (Short Top Improved)
  • Topweight
  • All Seasons
  • Paris Market (round, for heavy soils)

Key Challenges

  • Root-knot nematodes in sandy tropical soils
  • High soil temperatures killing germinating seed
  • Alternaria leaf blight in residual humidity
  • Short harvest window before heat returns

Pro Tips

  • Kuroda types are specifically bred for hot climates. Ignore Nantes for FNQ
  • Pre-wet soil, sow in late afternoon, and mulch immediately to cool soil surface
  • Shade cloth (30%) over seedbed for first 2 weeks dramatically improves germination

Harvesting Carrot

When ready: Shoulder of carrot visible at soil surface, typically 2-3cm diameter for standard varieties. Foliage is still green and vigorous. Pull one test root to check size and colour development.

How to harvest: Loosen soil alongside row with garden fork before pulling. Grasp foliage close to crown and pull gently with a twist. In heavy soils, always fork first to avoid snapping roots. Twist off tops immediately after harvest.

Worth growing?

A 2.4 m × 1.2 m bed fits 115 plants, about $34 worth at today’s Aldi, Coles, IGA and Woolworths prices, checked on 20 September.

That is roughly 14 kg at $2.45 a kilo.

Draw your carrot bed → No account needed.

Where to next

What carrot costs in the shops right now, retailer by retailer, updated daily.

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

The pest most likely to find your carrot: Wireworms.

Supermarket Price

Current average retail: $2.45/kg (12-month range: $1.49–$2.90)

Grow your own and save on grocery bills.

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Common Questions About Carrot

When do you plant carrot in Australia?

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

Does carrot grow all year round in Cairns?

No. In the Tropical zone the planting months are Apr to Jun. 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.