When to plant tomatoes in Australia - by climate zone

In most of Australia, tomatoes are planted in spring once soil temperature reaches 15 °C and the last frost has passed. In temperate zones (Melbourne, Adelaide, Sydney) that usually means mid-October to mid-November. In cool zones (Hobart, Canberra, the highlands) wait until November. In subtropical Brisbane and the NSW north coast you can plant from August through to February, and in tropical Darwin and Cairns the main tomato season is the dry season - April to July.

If you plant earlier than your zone allows, cold soil stalls the roots, fruit set is poor, and seedlings sit shivering for weeks. Plant later and you run out of warm weather before the fruit ripens.

What month should I plant tomatoes in Melbourne?

Melbourne sits in a temperate zone with a real frost risk through September. The traditional rule - "plant after Melbourne Cup Day" (early November) - still holds for most home gardens. Cup Day weekend is a useful single-date trigger for cool inner suburbs. North-facing brick walls, raised beds, or polytunnels can let you push the date back to mid-October.

Use a cheap soil thermometer at 10 cm depth, first thing in the morning. When you see four consecutive mornings above 15 °C, you can plant.

Tomato planting windows by Australian climate zone

Cool temperate (Hobart, Canberra, alpine NSW/VIC)

• Sow seed indoors: August–September
• Plant out: November after last frost
• Last sensible planting: mid-December
• Expect first ripe fruit around 75–85 days from transplant. Cherry varieties ripen first; large beefsteaks may struggle to finish before autumn.

Temperate (Melbourne, Adelaide, Sydney, Perth)

• Sow seed indoors: late August
• Plant out: mid-October to mid-November
• Last sensible planting: late December
• Most varieties will produce a full crop. Coastal Sydney and Perth can squeeze in a late summer planting for an autumn harvest.

Subtropical (Brisbane, Sunshine Coast, northern NSW)

• Plant out: August through February, avoiding the most humid mid-summer weeks
• The challenge here is humidity, not cold. Choose disease-resistant varieties and stake well to keep foliage off the ground.

Tropical (Darwin, Cairns, far north QLD)

• Plant out: April–July (the dry season)
• The wet season is too humid and too hot for fruit set. Tomatoes will grow leaves but drop flowers above 32 °C overnight.

What soil temperature do tomatoes need?

Tomatoes are warm-soil crops. The minimum for germination is 15 °C and they grow strongly from 18–25 °C. Below 15 °C the roots barely function, even if the air feels mild. This is why a sunny October day can fool you - measure the soil, not the air.

If you're planting into a raised bed or a black pot, the soil warms a week or two earlier than ground beds. My Veggie Patch flags the right planting window for your specific suburb based on long-term soil temperature data, so you don't have to guess.

How long do tomatoes take to grow?

From transplanting a seedling, expect:

• Cherry varieties (Tommy Toe, Sweet Bite): 55–65 days to first ripe fruit
• Standard slicers (Grosse Lisse, Mortgage Lifter): 75–85 days
• Large beefsteaks (Black Russian, Brandywine): 85–100 days
• Roma/paste types (San Marzano, Roma VF): 75–85 days

From seed (sown indoors), add 6–8 weeks for the seedling stage.

Tomato varieties that suit Australia

Australian gardens get harsh sun and unpredictable summer rain, so look for heat-tolerant and disease-resistant varieties:

• Grosse Lisse - the classic Australian slicer, reliable in every state
• Tommy Toe - heritage cherry, exceptional flavour, very productive
• Black Russian - beefsteak, sweet and complex, needs a long season
• Roma VF - paste tomato bred for verticillium and fusarium resistance
• Tropic - the standard tomato for humid Queensland summers
• Tigerella - early-fruiting, good for short seasons in Tasmania and the highlands

Avoid Northern Hemisphere catalogue favourites bred for cool, dry summers - they often collapse in Australian humidity.

Plan this in My Veggie Patch →

Set your suburb and My Veggie Patch will tell you the exact week to plant tomatoes, recommend varieties for your climate, and remind you to stake, side-dress and prune. Start free at app.myveggiepatch.com.au/signup

Common tomato planting mistakes in Australia

1. Planting too early. September feels like spring but soil is still cold. Wait for 15 °C at 10 cm.
2. Burying the stem too shallow. Tomatoes root along buried stem. Plant deep - bury two-thirds of the seedling.
3. Skipping the stake. A small tomato seedling becomes a 2 m vine. Put the stake in at planting, not later.
4. Overhead watering. Wets the leaves and spreads fungal disease. Water at the base, early morning.
5. Crowding. One indeterminate plant needs 60 cm space. Crowded plants get blight.
6. Ignoring crop rotation. Don't plant tomatoes where tomatoes, potatoes, capsicum or eggplant grew last year.

Tomato FAQ for Australian gardeners

When is the latest I can plant tomatoes in Sydney? Late December for a full crop. After that, plant a quick cherry variety like Tommy Toe for an autumn harvest.

Can I plant tomatoes in winter in Australia? Only in tropical zones (Darwin, Cairns) during the dry season. In every other zone, frost will kill them.

Do tomatoes need full sun? Yes - at least six hours of direct sun daily, ideally morning sun. Less than that and you'll get leaves but few fruit.

Should I prune tomato leaves? Remove leaves below the lowest fruit truss and any leaves touching the soil. Don't strip the plant - leaves feed the fruit.

Why are my tomato flowers falling off? Usually heat stress (above 32 °C overnight) or lack of pollination. Tap the flower trusses gently each morning to help pollen drop.

What's the easiest tomato variety for beginners? Tommy Toe or Sweet Bite cherry tomatoes. They tolerate imperfect conditions and crop heavily, which is the most encouraging thing a new gardener can experience.