When to Plant Tomato in Cairns, Tropical Guide

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

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

This Tomato 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.

Tomato

Photo: Wikimedia Commons

Tomatoes are Australia's most popular home-grown vegetable and arguably the most rewarding. The difference between a sun-ripened home-grown tomato and a supermarket specimen is profound. They require warmth, consistent moisture, and attention to pest management (especially fruit fly in QLD/NSW). Hundreds of varieties available from cherry to beefsteak, determinate to indeterminate, heirloom to hybrid. Grafted plants offer disease resistance for problem soils.

Planting Calendar for Tropical

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

S = Seed Tray   T = Transplant   D = Direct Sow

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

One email a week with what is worth planting in the Tropical zone right now, Tomato included, plus which veg has jumped in price at the supermarket. Free, and you can stop it in one click.

Current Growing Conditions

Soil temperature: 21.4°C (optimal range: 18–30°C) ✓ Ready to plant

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

How to Grow Tomato in Tropical Australia

When to Plant

Dry season (April-September) is prime. Wet season growing possible but extreme fungal pressure. Year-round cherry tomato production possible in some microclimates.

Soil
Well-drained, rich loam with plenty of compost. Deep soil preferred. pH-adjusted with lime if acidic.
pH Range
6.0-6.8
Sunlight
Full sun (minimum 6-8 hours daily). More sun = more fruit = more flavour.
Spacing
60cm apart, 90cm between rows
Watering
Deep watering 2-3 times per week, consistent and at the base. NEVER overhead water, promotes fungal disease. Inconsistent watering is the #1 cause of blossom end rot and fruit splitting. Drip irrigati

Companion plants: Basil, Marigold, Parsley, Carrot, Nasturtium

Avoid planting near: Brassicas, Fennel, Dill (attracts tomato hornworm), Potato (shared diseases)

Tropical Growing Tips for Tomato

Recommended Varieties

  • Tropic
  • Floradade
  • Sweet Bite (cherry)
  • Tropical Ruby
  • Roma (for paste)

Key Challenges

  • Fruit fly year-round, critical management needed
  • Bacterial wilt in wet soils
  • Blossom drop above 35C
  • Humidity drives fungal diseases

Pro Tips

  • USE GRAFTED PLANTS on wilt-resistant rootstock (Maxifort, Beaufort, or Wild Malay eggplant rootstock). This is the single most impactful thing you can do in tropics
  • Shade cloth (30%) reduces fruit scald and extends productive period
  • Raised beds essential for drainage

Harvesting Tomato

When ready: Fully coloured (red, pink, yellow depending on variety), slight give when gently squeezed, aromatic. For best flavour, pick vine-ripened. In fruit fly zones, pick at 'breaker' stage (first colour change) and ripen indoors.

How to harvest: Twist and snap or cut with clean secateurs. Harvest in morning when cool. Handle carefully to avoid bruising.

Worth growing?

A 2.4 m × 1.2 m bed fits 9 plants, about $293 worth at today’s Aldi and Coles prices, checked today.

That is roughly 41 kg at $7.24 a kilo.

Draw your tomato bed → No account needed.

Where to next

What tomato 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 tomato: Late Blight.

Supermarket Price

Current average retail: $7.24/kg (12-month range: $3.00–$29.00)

Grow your own and save on grocery bills.

Get the Full Interactive Guide

Track your garden, get real-time pest alerts, and plan around your zone's weather.

Open the planting dashboard Join Garden Buddy

Common Questions About Tomato

When do you plant tomato in Australia?

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

Does tomato grow all year round in Cairns?

No. In the Tropical zone the planting months are May 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.