How to Grow Capsicum in New Zealand

Updated June 2026

Capsicums are a long, warm-season crop that reward patience with sweet, crunchy fruit. New Zealand stretches from the warm subtropical north to the cool deep south, so the single most important thing is matching your sowing to your region. In the warm north a sheltered sunny spot is plenty. Further south a glasshouse or polytunnel makes ripening far more reliable.

Use the climate sowing selector below to see when to start seed, whether to sow indoors or direct, in-ground or in a pot, and the warmth your plants will need.

What it looks like as it grows

Position & soil

Capsicums need the warmest, sunniest, most sheltered spot you have, with at least 6 to 8 hours of direct sun. Wind chills the plants and snaps fruiting branches, so shelter matters as much as sun.

• 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, grow against a warm north-facing wall, in a pot that warms quickly, or under cover.
• Avoid beds where you grew tomatoes, potatoes, or eggplant last season, as they share soil diseases.

Sowing & planting

1. Start seed indoors 8 to 10 weeks before planting out. Capsicums germinate slowly and need warm soil around 22 to 28 degrees C. A heat pad or warm windowsill helps.
2. Sow seed about 5 mm deep. Expect germination in 10 to 21 days, sometimes around 14.
3. Plant out only after the last frost and once nights stay reliably above 15 degrees C. Cold soil stalls young plants for weeks.
4. Harden off seedlings over a week before they go in the ground.
5. In-ground or pot: both work. A pot of at least 30 cm across suits balconies and cooler regions because it warms faster than garden soil.

Spacing

Space plants about 45 cm apart, in rows roughly 60 cm apart. Capsicums form compact bushes around 60 cm tall and need good airflow but less room than tomatoes. Stake each plant or use a small cage, as heavy fruit can snap branches.

Watering & feeding

• Water deeply and evenly. Steady moisture is the key to avoiding blossom end rot.
• Mulch well with straw or pea straw to hold moisture and even out soil temperature.
• Feed fortnightly once flowering starts with a potassium-rich fertiliser such as tomato food.
• Go easy on nitrogen, which pushes leafy growth at the expense of fruit and can cause flower drop.

Pollination

Capsicums are self-fertile, so each flower can set fruit on its own without a second plant. A gentle daily shake helps move pollen within the flower, which is especially useful under cover where there is little wind. The main risk is heat or cold-related flower drop: flowers tend to fall when days climb above 35 degrees C or nights fall below 15 degrees C. 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 soil shortage. Water deeply and evenly, mulch well, and avoid high-nitrogen feeds. Remove affected fruit so the plant can focus on healthy ones.

Flower drop

Flowers fall without setting when nights drop below 15 degrees C or days climb above 35 degrees C, or when there is too much nitrogen. Plant out only once nights are reliably mild, and shelter young plants early on.

Sunscald

White or pale patches on fruit exposed to harsh direct sun. The fruit is still edible. Keep enough leaf cover and avoid heavy mid-season pruning.

Pests

Watch for aphids, whitefly, and the tomato or potato psyllid. See our NZ pest and disease guide for organic control.

Harvest & ripening

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

• First green fruit is ready in roughly 100 days from 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 more flowers.
• 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.

Best capsicum varieties for NZ

Companion planting

Capsicums grow happily near basil, tomatoes, carrots, and marigolds. Avoid planting them right next to fennel.