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Growing Capsicum in Tasmania

Introducing Capsicum

Also known as bell peppers and sweet peppers, these colourful, mild peppers are a beautiful addition to the summer garden. They need a long warm growing season, so, in Tasmania its best to plant seedlings or start them indoors.

In Tasmania, capsicums do best in a greenhouse or poly-tunnel, which stay warmer than outdoors and provide a slightly longer growing season. Plants can also be grown successfully outdoors, although the harvest are often smaller and some varieties won’t reach full-maturity. If you are planting outdoors, choose varieties which have a shorter growing season or don’t need as much summer heat. Smaller varieties generally reach maturity quicker than larger varieties.

Classic Mistakes

Make sure you start your plants early enough to make the most of the short warm season, but not before the soil has warmed sufficiently.


Grow in: Full Sun

Capsicums love warmth and sunlight in warm climates they need some protection from the hottest sun, but in Tasmania, full sun is the way to go.

Soil Preparation

Prepare your soil with compost and well-rotted manure. The extra organic material will feed your capsicums and help with water retention over the heat of summer. They can develop blossom rot if your soil is low on calcium. Add some bonemeal to your soil to improve the calcium levels. It’ll also help your plants develop strong root systems to support them right through the season.

Capsicums need excellent drainage. So, if your garden is prone to waterlogging, then rather grow them in pots or raised beds.

Sowing Seed

Sow seed: October-December
Sowing depth: Simply place the seeds on top of your soil and sprinkle with a very thin layer of compost.

Seeds can be started indoors (usually on heat mats) in September or October. Capsicums need quite high temperatures to germinate, so if you want a long growing season, it’s usually better to plant seedlings. If you’re after a less common variety then you might need to start your own from seed as only a few varieties are readily available as seedlings.

Simply place the seeds on top of your soil and sprinkle with a very thin layer of compost. Place them in a warm place (like in top of the fridge) or on a growing mat until the plants are up. Seeds can be started outdoors easily once the weather and the soil have warmed.

Capsicums are hard to germinate if the soil isn’t warm enough, so it’s much easier to start them from seedlings.


Plant seedlings: November-January

Plant seedlings into the garden once its consistently warm. (Usually sometime in December)

Try to plant bought seedlings as soon as possible after you get them home and remember to give them a good, deep watering to help them settle in. When you plant your seedlings out, add a small amount of organic bone-meal to each hole. Bone-meal gives seedlings a great start and helps them to develop strong root systems which support a healthy plant.


Potted plants can be overwintered indoors or in a greenhouse. Prune them lightly in winter.

Larger varieties need to be staked. Tomato cages or a simple stick or bamboo pole work well.


Chillies have deep root systems, so they need regular deep watering. If they have a good mulch, then a deep watering twice a week should be fine, but if it’s particularly hot and they look thirsty, then water them more often.


Feed your plants regularly with compost tea or and organic fertilizer to encourage strong plants and a bumper harvest. An organic tomato fertilizer is also a great option once the flowers start to appear. It helps the plants produce plenty of good-quality fruit.


Straw is a great mulch for capsicums. It keeps their roots cool, the water in the soil, and, it smothers weeds that will compete for nutrients. Lucerne, pea straw or sugar cane are all good options. Remember to keep topping up your mulch through the season as it breaks done fast in hot weather.


Harvest: 10 to 12 Weeks After Planting

Some varieties twist of easily by hand, but scissors, a knife or secateurs will help with the more stubborn varieties. Keep picking peppers throughout the summer to encourage production.

Capsicums can be harvested as soon as they are a decent size. Most varieties start out green and then change to their particular colour as they mature, but they can really be eaten at any stage. The flavours change and develop quite dramatically as the fruits mature, so pick them at the right stage for your culinary needs.

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