Ruqayyah Snyder
Tomatoes are a popular crop to grow in Australia, and with the right tools and conditions, you can enjoy a plentiful harvest. Tomatoes are typically grown in spring and summer, but the timing depends on the region and climate zone. They require a sunny spot with well-drained soil and protection from strong winds. The seeds should be sown 5mm deep and kept moist until they germinate, which usually takes around 5-10 days at a soil temperature of 21-27°C. While tomatoes are relatively easy to grow, they are susceptible to pests and diseases, so it is important to take preventative measures.
| Characteristics | Values |
|---|---|
| Climate zone | Tomatoes can be grown in all climate zones in Australia. |
| When to grow | In tropical and subtropical climates, they can be grown all year round, but are best in autumn and winter, during the dry season. In temperate, cool, and cold climates, sow from spring. |
| Where to grow | Choose a bright, sunny spot in the garden with well-drained soil. |
| Soil preparation | Prepare soil by weeding it thoroughly, digging it over to loosen it, and adding aged animal manure or compost. |
| Seed treatment | Tomato seeds do not require any treatment (e.g., soaking, stratification) before sowing. |
| Seed sowing | Sow seeds directly in the garden 5mm deep and 50cm apart, with rows 60-70cm apart. |
| Soil moisture | Keep the soil moist but never wet or dry. |
| Germination | Seeds should germinate in around 5-10 days at a soil temperature of 21-27°C. |
| Seedlings | Young seedlings will need protection from pests, pets, and weather until they are established. |
| Transplanting | Wait until seedlings are at least 5 cm tall before transplanting into pots or garden beds. |
| Growing time | Depending on the climate and variety, tomatoes will be ready to harvest 10-12 weeks after planting. |
| Support | Indeterminate tomatoes require stakes or similar support. You can use round or triangular tomato cages or build a teepee tunnel with bamboo stakes. |
| Pests | Tomato plants are very susceptible to pests. Treat tomato grubs with organic Dipel. Prevent fruit flies with bags, covers, or organic fruit fly control spray. |
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What You'll Learn
Soil preparation and sowing
Soil preparation is key to growing healthy tomatoes. Choose a sunny spot in your garden that receives at least six hours of full sun each day. Tomatoes grow best in warm, sunny environments with temperatures averaging between 21 and 29°C. They need well-drained soil enriched with plenty of organic matter. Prepare the soil by weeding it thoroughly, digging it over to loosen it, and adding aged animal manure or compost. Keep the area free of weeds until planting.
Tomatoes are susceptible to pests and diseases, so it's important to choose the right soil and take steps to prevent issues. Avoid reusing soil from crops in the same family (potatoes, eggplants, and capsicums), as this increases the risk of soil-borne diseases. You can use a good quality potting mix and ensure your container is large enough for mature plants—a minimum of 40 litres is recommended for tomatoes. If growing in a garden bed, consider a raised bed to improve drainage.
Tomato seeds do not require any treatment before sowing. You can sow seeds directly into the garden or start seedlings in trays or containers and transplant them later. Sow seeds 5mm deep and 50cm apart, with rows 60-70cm apart. Keep the soil moist but not wet. Seeds won't germinate until the soil reaches 15°C, so consider starting seeds indoors in early spring, then transplanting them outdoors when the soil is warmer. You can also create a mini greenhouse to keep seeds warm in temperate regions.
Spring is generally the best time to plant tomato seeds, though in tropical and subtropical climates, they can be grown all year round. Timing varies depending on your location, but wait until the risk of frost is over. Tomatoes can be grown in all climate zones across Australia, but they require different treatments in different climates.
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Climate and timing
Tomatoes are a warm-season crop and can be grown in all climate zones around Australia. They grow best in a temperate climate and during spring and summer. In tropical and subtropical climates, they can be grown all year round, but are best in autumn and winter, during the dry season. In temperate, cool and cold climates, sow from spring.
Tomatoes love warmth and grow best when temperatures average between 21 and 29°C. They need full sun to develop tasty fruit, so choose a position in your yard that receives at least six hours of sun a day and is protected from strong winds.
To get a head start on the season, sow seeds indoors in late winter and transplant them into pots or garden beds once the risk of frost has passed. Seeds won't germinate until the soil reaches 15°C, so if you sow seeds in pots on a sunny windowsill from early spring, they'll be ready for planting outdoors once the garden has warmed up.
Tomatoes can be sown directly into the garden or grown in trays or other containers and transplanted once established. Keep the soil moist but never wet or dry. Seeds should germinate in around 5-10 days at a soil temperature of 21-27°C.
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Container growing
Tomatoes can be grown in pots or containers, and it is recommended that you choose a variety that is suitable for container growing. A minimum container size of 40 litres is advised for tomatoes, and a good quality potting mix should be used. During the growing season, container-grown plants may need additional fertiliser to encourage healthy growth.
Tomato seeds can be sown directly into the container, 5mm deep and 50cm apart. Keep the soil moist but never wet or dry. Seeds should germinate in around 5-10 days at a soil temperature of 21-27°C. However, seeds won't germinate until the soil reaches 15°C, so it is recommended to sow seeds in pots on a sunny windowsill from early spring, and then transplant them outdoors when the garden has warmed up. In temperate regions, seeds and seedlings need to be kept warm to grow and thrive. You can create a mini greenhouse to help with this.
Tomato plants need a well-drained soil enriched with plenty of organic matter. Prepare the soil by weeding it thoroughly, digging it over to loosen it, and adding aged animal manure or compost. Keep the area free of weeds until planting.
Tomato plants are very susceptible to pests and diseases, so young seedlings will need protection until they are established.
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Pest control
Tomatoes are susceptible to a range of pests and diseases. To avoid this, it is recommended to practice crop rotation and not plant tomatoes in the same position two years in a row.
Young seedlings will need protection from pests, so be sure to cover them with netting or a similar barrier. This will also prevent birds and possums from attacking your tomatoes. Drape the netting over a framework to keep the fruit away from pecking birds and stop the netting from damaging the plant.
Sap-sucking pests, especially aphids, can cause new growth to curl and twist. Caterpillars, aphids, and whiteflies are common pests that find tomatoes irresistible. To control them, spray at first sight with an insecticide such as Yates Advanced Ready To Use. Spray the foliage thoroughly, including the undersides, as good coverage is essential. Tomatoes are also sometimes attacked by mites, which can be treated with Yates Lime Sulfur.
If you live in an area with fruit flies, you will need to protect your plants from these pests. Tomatoes can also be attacked by various diseases, such as powdery mildew, rust, early blight, and target spot. Blossom End Rot is another common issue, which can be prevented by ensuring consistent access to moisture and using fertilisers containing calcium. To avoid other diseases, do not overwater your plants, and if the sun is very hot, consider shading your tomatoes with a shade cloth.
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Harvesting
Tomatoes are ready to harvest 10 to 12 weeks after planting. The fruit should be plump and red, or yellow, depending on the variety. You can harvest tomatoes by gently twisting the fruit until the vine snaps. Cherry tomatoes are popular with children, as they can harvest almost every day once these prolific plants begin bearing fruit.
Tomatoes are susceptible to pests and diseases, so it is important to take precautions when growing them. For example, you can use exclusion fabric bags or organic fruit fly control spray to prevent fruit flies. You can also treat tomato grubs with organic Dipel.
It is important to keep the soil moist but not wet during the growing season. Water your tomato plants with a seaweed solution and don't overfeed them. Simply add pelletised manure during the growing stage. Make sure to remove any leaves that come into contact with the soil and mulch around each plant to a depth of about 15 cm.
Tomatoes grow best in full sun, so choose a location that receives at least six hours of sunlight per day. The temperature should be between 21 and 29°C. In temperate regions, seeds and seedlings need to be kept warm to grow and thrive. You can create a mini greenhouse using a polystyrene box and a small glass window or plastic sheet. Alternatively, you can buy a mini greenhouse.
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Frequently asked questions
In tropical and subtropical climates, tomatoes can be grown all year round, but are best in autumn and winter, during the dry season. In temperate, cool and cold climates, it is best to sow from spring. Spring is the best time to plant tomato seeds to ensure they fruit through summer and into autumn.
Tomato plants are best grown in full sun. Choose a location that will receive at least 6 hours of full sun each day. Tomato plants need a well-drained garden bed or pot with enriched soil. Prepare the soil by weeding it thoroughly, digging it over to loosen it and adding aged animal manure or compost. Keep the soil moist but never wet or dry. Seeds should germinate in around 5-10 days at a soil temperature of 21-27°C.
Tomatoes are susceptible to pests and diseases. Create a mini greenhouse using a polystyrene box and a small glass window or plastic over the top. Alternatively, buy a mini greenhouse. You can also use potash around plants monthly to improve health, flowering and fruit set. Train tall plants on stakes or wire frames. Prevent fruit flies with bags or covers of exclusion fabric or use organic fruit fly control spray.
