Ruqayyah Snyder
Chilli plants can be grown in most parts of Australia, but the timing and methods vary depending on the region and climate. In warmer, tropical areas of Australia, chillies can be grown outdoors all year round. In contrast, regions with cold winters, such as Melbourne, may require a greenhouse or indoor setup to protect the plants from frost damage. The growing season for chillies typically starts in spring or early summer, and the plants prefer warm, sunny weather with plenty of direct sunlight. They can be grown in pots or directly in the soil, but they require well-drained, fertile soil and slightly acidic soil for optimal growth.
| Characteristics | Values |
|---|---|
| Climate | Chillies can be grown all year round in tropical parts of Australia. In cooler climates, they grow from spring to autumn. |
| Sunlight | Chillies need at least 8 hours of direct sunlight daily. |
| Soil | Well-drained soil with a pH of 5.5-6.5. |
| Temperature | Soil temperature should be at least 20°C. Nighttime temperatures should not drop below this level. |
| Frost | Chillies are frost-tender and can be killed by frost. |
| Watering | Chillies don't like constantly wet roots, especially in cooler months. |
| Pests | Aphids may be a problem for young seedlings. Sooty mould may develop after an insect attack. Exclusion netting is beneficial in areas with fruit fly infestations. |
| Harvesting | Harvest when the fruit is fully formed, which can take 10-12 weeks. |
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What You'll Learn
Growing chillies in pots
Chillies can be grown in most parts of Australia, but the conditions will vary depending on your region. Chillies thrive in full sun and need at least eight hours of direct sunlight per day to ensure flowering and fruiting. They grow well in pots, but they don't like to be overcrowded. Choose a pot that is at least 25-30 cm in diameter, and ensure there is only one plant per pot.
When growing chillies in pots, use a rich, well-drained soil and reliable moisture. Dig in extra well-rotted organic matter such as compost, well-rotted manure, or specialised compost. The soil should be moist but not wet, so check the moisture daily. Chillies are easy to overwater, so ensure the water can drain out of the pot. You can also place rocks at the bottom of the pot with holes to help filter the water.
Chillies need warm conditions to germinate (16°C and above). You can start the seeds in a seed tray or punnet, keeping them in a warm, sheltered spot. Once the seedlings are large enough to handle, transfer them to a small pot (around 10 cm) until they are ready to be transplanted into the garden or a larger container. Keep the seedlings warm and water them gently, applying a specialised solution weekly to stimulate strong root development.
As the plants grow, you can move them to larger pots. Select pots that are at least 30 cm in diameter. Place the pots in a warm, sheltered position away from strong winds, which can break the stems. If you live in a cooler region, wait until the last of the frost has passed before moving the plants outdoors. The advantage of growing chillies in pots is that you can easily move them around the garden to catch the sun or place them in a convenient harvesting location.
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Protecting chillies from frost
Chillies can be grown in most parts of Australia, but they are sensitive to frost and cold temperatures. To protect your chilli plants from frost, follow these steps:
Choose the Right Variety
Select chilli plants that are suitable for your climate. Some varieties are more tolerant of cold temperatures and frost than others. For example, in New Zealand, Jalapeño, Habanero, and Scotch Bonnet are popular choices for overwintering due to their hardiness. Check with local garden centres and hardware stores for recommendations on chilli varieties that will thrive in your area.
Timing is Key
Pay close attention to the timing of your planting. Avoid planting too early or too late in the season, as this can expose your plants to frost. Start your seeds indoors, and keep an eye on the weather forecast before transplanting your chilli plants outside. Ensure that the threat of frost has passed and that nighttime temperatures remain above 10°C.
Provide Adequate Shelter
Chilli plants prefer a warm, sheltered position away from strong winds. If growing in pots, you can easily move them to a sunny spot in your garden to protect them from frost. Consider using a greenhouse, cloches, row covers, or cold frames to provide additional shelter and warmth for your plants.
Overwintering
Overwintering is the practice of protecting your chilli plants during the winter months so that they continue to produce chilli peppers into the following year. To overwinter your chilli plants, gradually acclimate them to outdoor conditions by placing them in a sheltered spot for a few hours each day, slowly increasing the duration over one to two weeks.
Additional Tips
- Keep the roots of your chilli plants slightly dry during the cooler months, as they do not like constantly wet roots.
- Consider using a stake to provide extra support for your chilli plants, especially in windy conditions or if the branches are heavily laden with fruit.
- Chilli plants grown in pots should not be overcrowded, and pots should have a minimum diameter of 30 cm.
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Growing chillies from seed
Chillies are a great addition to any edible garden, and they can be grown all year round in Australia, especially in the warmer, tropical parts of the country. In cooler regions, it is best to wait until spring to start planting.
Chilli seeds do not require any treatment before sowing. Sow seeds 5-6mm deep in trays, punnets, or jiffy pots with a good-quality seed-raising mix or soil starter pellets. Keep the soil moist but never wet or dry. The ideal temperature for germination is between 22-35°C, and seeds should sprout within 7-21 days. Protect young seedlings from pests, pets, and weather until they are established. Aphids, for example, can be a problem for young seedlings, but these can be controlled with an organic horticultural oil-based spray.
Once the seedlings have their first true leaves and are about 5-10cm tall, they can be transplanted to the garden. Space the plants 40-60cm apart, with rows 60-100cm apart. Chilli plants can be grown in containers, but they should not be overcrowded. A minimum diameter of 25-30cm is recommended for a single seedling or plant in a deep pot. If growing in the ground, chilli plants may need a stake for support, especially if grown in an exposed, windy location.
Chilli plants thrive in full sun and need at least 6-[8] hours of direct sunlight each day. They also require fertile and well-drained soil that is slightly acidic (5.5-6.5 pH). Before planting, prepare the soil by weeding, digging, and adding aged animal manure or compost. Water the plants during the growing season, but be careful not to overwater, as chillies do not like constantly wet roots.
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Chilli growing seasons in Australia
Chillies can be grown in most parts of Australia, but the growing season varies depending on the region and climate. In general, chillies grow well in warm to hot temperatures and full sun, and they require a minimum of eight hours of direct sunlight per day to ensure flowering and fruiting.
In warmer or tropical parts of Australia, chillies can be grown year-round, but they are typically sown from autumn to spring. In these regions, chillies thrive in full sun and benefit from well-drained, fertile soil with a slightly acidic pH of 5.5–6.5.
In cooler climates, chillies are typically grown as a summer to early autumn crop, with plenty of shelter from cold winds. It is recommended to wait until after the last frost to plant chillies in these regions. To extend the growing season in cooler areas, chillies can be grown in pots and moved to a warm, sheltered location, such as a sunny verandah or greenhouse, when the weather starts to cool.
In regions with short growing seasons or for those growing super-hot chilli varieties, it is advisable to start seeds indoors during the early spring for transplantation outdoors when the weather is consistently warm. Chilli seeds require a steady warm soil temperature of at least 20°C, and nighttime temperatures should not drop below this level if sowing outdoors.
Chilli plants can be slow to grow, and fruit may not appear until well into autumn. To promote fruit production, it is recommended to keep chilli plants over winter in a warm spot so they are well-established when summer returns.
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Chilli varieties for different climates
Chillies can be grown in most parts of Australia, but the variety you choose to grow will depend on the climate in your area. In general, chillies thrive in full sun and produce more fruit when exposed to heat and direct sunlight. They grow well in pots, particularly in warm, sheltered positions away from strong winds, which can break their stems.
In cold climates, grow chillies as a summer to early autumn crop, ensuring they have plenty of shelter from cold winds. If grown in cooler regions, wait until the last of the frost is gone before planting. In the tropics, chillies grow year-round but are best sown from autumn to spring. In warmer parts of Australia, chillies can be grown outdoors all year round.
Some varieties that can be grown in Australia include:
- Manzano, a rocoto variety from South America
- Thai chillies
- Cayenne
- Carolina Reapers
- Habanero
- Jalapeño
- Hungarian Black Chilli
- Sweet Peppers
- Capsicum Purple Beauty
Different varieties of chillies have different levels of heat, which is measured in Scoville Heat Units (SHU). The heat of a chilli comes from a chemical called capsaicin, which is particularly concentrated in the seeds. The heat of a chilli can also be controlled by deseeding it.
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Frequently asked questions
Chillies thrive in warm spring and summer temperatures and in most parts of Australia, they grow from spring to autumn. In cold climates, grow chillies from summer to early autumn, and in the tropics, they grow year-round but are best sown from autumn to spring.
Chillies can be grown in pots or soil that is fertile and well-drained. They need full sun to ripen the fruit and produce more chillies when exposed to heat and direct sunlight. They also prefer slightly acidic soil of 5.5-6.5.
Chillies are frost tender and can be killed off by the winter, so they should be grown in pots and placed in a warm spot during winter. In areas with a short growing season, start seeds indoors for early spring transplants. Chilli seeds need a steady, warm soil temperature of at least 20 degrees Celsius to germinate.
