How to Grow Capsicum in Australia

Updated June 2026

Colourful capsicums at different stages of ripening on a plant

A climate sowing selector, variety picks, ripening tips, and the fixes for common problems.

Capsicums are a rewarding warm-season crop that produce colourful, crunchy fruit from a surprisingly compact plant. They need a long warm growing season and a little patience, but the payoff is far better flavour than shop-bought fruit. Home-grown capsicums left to ripen fully on the plant are genuinely sweet.

The trick in Australia is matching your sowing to your climate. A Darwin grower and a Hobart grower are months apart, and the difference between starting indoors and direct sowing is what separates a good crop from a stalled one. Use the selector below to see what your climate calls for, then read on for varieties, ripening, and how to dodge blossom end rot.

Climate sowing selector

Choose your climate zone

Pick your climate to see when and how to sow capsicum where you garden.

What it looks like as it grows

Position & soil

Capsicums want the warmest, sunniest spot you have, with at least 6 to 8 hours of direct sun a day. Choose a sheltered position out of strong wind, which can snap the brittle branches once they carry fruit.

Soil should be rich, free-draining, and slightly acidic to neutral (pH 6.0 to 7.0).
Dig through plenty of well-rotted compost or aged manure before planting.
In cooler regions, growing against a warm north-facing wall or in a pot that warms quickly will lift ripening rates noticeably.
Avoid beds where you grew tomatoes, eggplant, or potatoes last season, as they share soil diseases.

Sowing & planting

Start seeds indoors 8 to 10 weeks before transplanting. Capsicums germinate slowly and need warm soil around 22 to 28 degrees C. A heat mat or warm windowsill speeds things up.
Sow seed about 5 mm deep in trays or small pots of seed-raising mix. Expect germination in 10 to 21 days.
Transplant only after all frost risk has passed and overnight temperatures sit reliably above 15 degrees C. Cold nights stunt growth and delay fruiting.
Harden off seedlings over a week, moving them outdoors for longer each day before planting out.
In-ground or pot: capsicums do well either way. A pot of at least 30 cm across with free-draining mix suits balconies and cooler climates because it warms faster than garden soil.

Spacing

Space plants 40 to 50 cm apart in rows about 60 cm apart. Capsicums grow into compact bushes roughly 60 cm tall, so they need good air circulation but not as much room as tomatoes. Stake each plant or use a small cage, since heavy fruit can snap branches.

Watering & feeding

Water deeply and evenly. Consistent moisture is the single biggest factor in avoiding blossom end rot.
Mulch heavily with straw or sugarcane to hold moisture and steady the soil temperature.
Feed fortnightly once flowering begins with a potassium-rich fertiliser such as tomato food.
Go easy on nitrogen. Too much pushes leafy growth at the expense of fruit and can trigger flower drop.

Pollination

Capsicums are self-fertile, so each flower can set fruit on its own without a second plant. A gentle daily shake of the plant, or a light breeze, helps move pollen within each flower and improves fruit set. The bigger risk is heat-related flower drop: when day temperatures climb above 35 degrees C or night temperatures fall below 15 degrees C, flowers often drop before they set. Steady warmth matters far more than attracting pollinators.

Common problems

Blossom end rot

Dark, sunken patches on the bottom of the fruit. This is a calcium issue in the developing fruit, almost always caused by inconsistent watering rather than a lack of calcium in the soil. Water deeply and evenly, mulch well, and avoid high-nitrogen feeds. Remove affected fruit so the plant redirects energy to healthy ones. Capsicums are more prone to this than tomatoes.

Flower drop

Flowers fall off without setting fruit when nights drop below 15 degrees C or days climb above 35 degrees C, or when the plant has had too much nitrogen. Be patient through temperature extremes and provide afternoon shade in heatwaves.

Sunscald

White or pale leathery patches on fruit exposed to harsh direct sun. The fruit is still edible. Keep good leaf cover by not over-pruning, and use light shade cloth in extreme heat.

Aphids

Clusters on new growth and under leaves. Spray with soapy water or neem oil, and encourage ladybirds and lacewings as natural predators.

Harvest & ripening

All capsicums start green and change colour as they ripen, so a green capsicum is simply an unripe one. Leaving fruit on the plant to fully colour up (red, yellow, orange, or brown) develops far more sweetness, flavour, and vitamin C.

First green fruit is ready 10 to 14 weeks after transplanting.
Full ripening takes another 3 to 4 weeks of warm weather once fruit reaches full size.
Pick the first few fruit green to encourage the plant to keep producing.
Cut fruit with secateurs rather than pulling, which can tear branches.
In cooler regions, remove late-season flowers so the plant ripens existing fruit before autumn.

Tip: Consistent watering is the single most important thing you can do for capsicums. Pair it with a thick mulch and you will sidestep most blossom end rot.

Best varieties for Australian gardens

Variety	Type	Best for
California Wonder	Blocky green-to-red bell	The classic all-rounder. Thick walls, sweet when fully ripe, reliable in all warm regions.
Mini Sweet	Snack-sized red, orange, yellow	Prolific on compact plants and quick to ripen. Great for pots and lunchboxes.
Bullhorn	Long tapered sweet pepper	Thick, sweet flesh that ripens green to red. Excellent roasted or stuffed.
Sweet Banana	Pale yellow to red	Mild, early, and very productive. A smart pick for cooler regions that ripens faster than bells.
Chocolate Beauty	Brown bell	Rich, sweet flavour and an unusual colour for salads. Ripens reliably in warm conditions.

Sowing by season

Australia spans the tropics to cool highlands, so timing varies widely. As a southern-hemisphere guide: temperate regions start seed indoors from August and transplant from October to December. Subtropical regions can sow across a longer window from late winter into summer. Tropical regions plant into the dry season, roughly March to August. Cool and mountain regions need an early indoor start and a sheltered, warm spot to ripen fruit before autumn. The selector above gives the detail for your climate.

Track Your Capsicum Growing

Add capsicums to your garden in the Planting Season app and get reminders for sowing, feeding, and harvest time.

Open the App →

Frequently Asked Questions

When should I plant capsicum in Australia?

Start seeds indoors 8 to 10 weeks before your last frost. Transplant outdoors once overnight temperatures are reliably above 15 degrees C. In temperate regions transplant from October to December. Tropical and subtropical regions can plant from late winter through summer.

How long do capsicums take to grow?

Capsicums take 10 to 14 weeks from transplanting to the first harvest of green fruit. Add another 3 to 4 weeks for fruit to fully ripen to colour. Start seeds early to make the most of the warm season.

Why are my capsicums not turning red?

Capsicums need warmth and time to ripen fully. Green fruit takes 3 to 4 weeks of warm weather to turn red. In cooler regions choose early-maturing varieties and remove late-season flowers to focus energy on ripening existing fruit.

What causes blossom end rot on capsicums?

Inconsistent watering is the main cause. The dark sunken patches on the bottom of fruit happen when the plant cannot move enough calcium to developing fruit. Water deeply and evenly, mulch well, and avoid over-fertilising with nitrogen.

Do capsicums need a second plant to pollinate?

No. Capsicums are self-fertile, so each flower can set fruit on its own. A gentle daily shake or a light breeze helps move pollen. In very hot or very cold weather flowers can drop before they set, so steady warmth matters more than a pollinator.

Can I grow capsicum in a pot?

Yes. Capsicums grow well in a pot of at least 30 cm across with free-draining mix. Pots warm up faster than garden soil, which suits cooler regions, but they dry out quicker so water consistently to avoid blossom end rot.

Why are the flowers falling off my capsicum?

Flower drop is usually caused by night temperatures below 15 degrees C or day temperatures above 35 degrees C, and sometimes by too much nitrogen. Be patient through temperature extremes and feed with a potassium-rich fertiliser once flowering begins.