When should I plant tomatoes in NZ?

Tomatoes are a popular garden crop in New Zealand, but timing is key when it comes to planting them. Here's what you need to know about when to plant tomatoes to get the best results.

Climate and Growing Zones

The best time to plant tomatoes in NZ depends on the climate and growing zone you are in. In areas with mild climates, such as Auckland or the Bay of Plenty, tomatoes can be planted from September through to December. In cooler areas like Dunedin, tomatoes should be planted from October through to November.

It's also worth considering your growing zone. New Zealand has 12 different zones as defined by the National Institute of Water and Atmospheric Research (NIWA). Tomatoes should be planted according to the specific planting times recommended for your zone.

Planting Methods

There are two main methods of planting tomatoes: seedlings and seeds. Seedlings are young tomato plants that have been grown from seed, and are ready to be planted straight into your garden bed. If you choose to plant seedlings, it's best to wait until the risk of frost has passed, and the soil has warmed up to at least 15°C.

Alternatively, you can plant tomato seeds indoors in seed trays, and then transplant the seedlings into your garden bed once they are strong enough. This allows you to start your tomato plants earlier in the season, and gives you more control over their growth.

Soil and Watering

When planting tomatoes in NZ, it's important to choose a well-draining soil that is rich in nutrients. Add some compost or organic matter to your soil before planting to help give your tomatoes a good start.

Tomatoes need to be watered regularly, but be careful not to overwater them as this can lead to root rot. Watering in the morning is best, as it allows the moisture to penetrate the soil before the heat of the day sets in.

Caring for Tomato Plants

Tomatoes need support as they grow, so consider using stakes or cages to keep your plants upright. Pruning your tomato plants can also help to improve their growth and yield. Remove any suckers that appear in the crotch joint of two branches, as these will not produce fruit and will divert energy away from the main stem.

Pests and diseases can also be a problem for tomato plants. Some common pests include aphids, whiteflies, and tomato fruitworms. Keep an eye out for any signs of damage, and consider using natural pest control methods if needed.

In summary

Tomatoes are a staple in many New Zealand gardens, but timing is key when it comes to planting them. Plan to plant your tomatoes during the recommended planting times for your specific growing zone, and use the appropriate planting method for your needs. Choose a well-draining soil and water your tomatoes regularly. Care for your tomato plants by providing support and pruning them as needed. Keep an eye out for pests and diseases, and address them promptly to ensure a healthy, plentiful tomato harvest.