Thinking of trying your hand at growing tomatoes? It’s a fantastic project for beginning gardeners! I’ve picked up tons of insights through trial and error, and each season brings new lessons. Don’t hesitate to experiment and keep backups handy—gardening is all about learning!
Starting Seeds
Start tomato seeds early, especially in cooler regions. And give yourself an excessive amount of seedlings! This way you can pick out the strongest ones for planting out – as these are also likely to be the ones with the best chance of disease resistance. You also don’t want to pin all your hopes on a few precious plants – as there’s so many things that can happen that are outside your control. With plenty of backups, you don’t need to stress if some of the plants don’t work out or begin to thrive. I generally would double the amount I actually think I’m going to need.
So just think about how many you want to do in like just double it. It’s not like it’s gonna cost you double and this will also let you be a bit more picky with choosing the best plants as well..
Tip: use cardboard egg cartons as eco-friendly seed containers that can be planted directly into the soil later. Begin indoors in late winter to jumpstart growth.
Young Plants and Transplanting
In cooler spots like Canberra, target planting around Melbourne Cup week (early November). While early planting can mean faster maturation, it also risks frost damage. Wait for consistently warmer nights before transplanting for optimal growth.
Tip: Gradually acclimate seedlings to outdoor conditions before transplanting to reduce shock.
Best Practices for Starting Tomato Seeds in Canberra
Regularly monitor your plants and remove weaker ones to provide ample space and nutrients to the robust ones. Overcrowding can lead to disease and hinder growth, so thinning out is crucial for healthy plants.
Tip: You can always take them out (keep the clump of dirt attached, transplant back into some planter pots and eventually give away as gifts!).
Companion Planting
Experiment with companion planting; for instance, zucchini pairs well with tomatoes, enhancing growth without nutrient competition. Marigolds and other flowers attract beneficial insects, aiding in pollination and pest control. Basil not only adds flavor but also deters pests and promotes tomato health. You can find herb growing tips at 10 Best Herbs To Grow in Canberra Blog
Tip: Rotate companion plants annually to maintain soil fertility and reduce pest buildup.
Watering
Observe your tomato plants for drooping leaves, a sign they need water. Water at the root level in the morning to minimize disease risks. During summer, adjust watering frequency to about twice a week, ensuring deep watering rather than surface dampness.
Tip: Apply mulch around plants to retain moisture, regulate soil temperature, and deter weeds.
Suckers
Identify and remove suckers—those extra shoots (you can identify them as they typically grow at a 45 degrees angle from the main stem)—to maintain plant vigor and balance. You can propagate removed suckers to grow new tomato plants, expanding your garden bounty.
Tip: Regularly prune to enhance air circulation, prevent diseases, and promote fruit production.

Pruning and Support
Prune yellowing or diseased leaves promptly to redirect the plant’s energy towards healthy growth. Support plants with stakes or cages, especially during windy or heavy fruiting periods, to prevent breakage and ensure optimal development.
Tip: Use soft ties or clips to secure plants without causing damage.
Fruiting
Some people prefer to stagger their planting of the tomato plants so that they might get a handful of tomatoes each week to use in salads or things like that on top of pizzas or whatever. Other people might prefer to plant them out at once so they can harvest a huge batch at once, and you might like to make sauces and preserves.
Anticipate a bountiful harvest from early January to April. Harvest green tomatoes before the first frost and ripen them indoors for later use. Place them in a brown paper bag to speed up the ripening process, storing them in a cool, dry place.
Tip: Check stored tomatoes regularly, removing any spoiled ones to prevent the spread of mold.

Recipe Links
Fresh Tomato chutney (Little River Kitchen
Author
Aaron from McGregor
You can also get some great tips and advice from real Canberra green thumbs by joining the Canberra Gardener Group on Facebook. They love sharing their knowledge with anyone and everyone!