How to Grow Eggplant (Aubergine) in New Zealand
Updated June 2026
When to sow by region, the best NZ varieties, and how to get fruit to set
What it looks like as it grows
Eggplant loves heat and needs a long warm season, which makes it one of the more demanding summer crops in New Zealand. It is even more heat-loving than capsicum: it wants warm soil of at least 18 degrees to establish, warm nights to set fruit, and a long run of summer warmth to ripen. In the warm north it crops well outdoors in a sheltered sunny spot. Further south, a glasshouse, a hot north-facing wall, or a moveable pot makes the difference between a token harvest and a real one.
Get the timing and the position right and the reward is generous. Home-grown eggplant picked at the right stage has a creamy texture and a mild flavour that beats anything from the shop, and a single plant will produce for months once it gets going.
Climate sowing selector
Choose your region above to see when to sow eggplant, whether to start indoors or sow direct, whether to grow in the ground or a pot, and the warmth it needs.
Position and soil
Give eggplant the hottest, sunniest position you have. A full day of sun is essential, and a spot against a north-facing wall or fence gives valuable reflected heat. Soil should be rich, free-draining, and well dug with compost, at a slightly acidic to neutral pH of about 6.0 to 7.0.
- Full sun, all day, with shelter from cold wind
- Rich, free-draining soil improved with plenty of compost
- Warm the soil before planting, or grow under cover in cooler regions
- A glasshouse or large pot against a hot wall is ideal further south
Sowing and planting
Eggplant seed is slow to germinate and needs warmth to get moving. Start seed indoors from August, giving plants a long head start. Soil temperature of 25 to 30 degrees gives reliable germination, so a heat pad or a warm windowsill helps. Plant out only once frost has passed, nights stay above 15 degrees, and the soil has genuinely warmed.
- Sow seed about 0.5 cm deep in seed-raising mix, on bottom heat if you can
- Keep the mix consistently moist but never waterlogged
- Germination takes around 14 days in warmth
- Pot up once seedlings have two true leaves and harden off before planting out
- Do not rush plants outside: a cold snap sets them back for weeks
Spacing
Space plants about 50 to 60 cm apart. Eggplant grows into a sturdy bush, but the fruit is heavy enough to pull branches down or snap them, so stake each plant early with a single stake or a tomato cage.
Watering and feeding
Consistent moisture is the key to tender, non-bitter fruit. Irregular watering causes tough skin and a bitter flavour, so water deeply and mulch well to hold moisture. Once flowering starts, feed every two weeks with a potassium-rich fertiliser to drive fruiting. Avoid heavy nitrogen feeds, which give a lush bush and little fruit.
Pollination
Eggplant flowers are self-fertile, so a single plant sets its own fruit. Help it along by gently shaking or tapping open flowers in the warmest part of the day. The main enemy of fruit set is temperature: in a cool New Zealand spring, nights below about 15 degrees cause flowers to drop without setting.
Companion planting
Grow eggplant near beans, marigold, thyme and capsicum. Keep it away from heavy-feeding brassicas that compete for the same rich soil.
Common problems
Flower drop
The most common complaint. Flowers form and fall without setting fruit, almost always because nights are too cool. Wait for settled warm weather, grow under cover if you can, keep water steady, and shake the flowers to assist pollination.
Blossom end rot
A sunken brown patch at the base of the fruit, caused by uneven watering disrupting calcium uptake rather than by a pest. Mulch and water consistently to fix it.
Aphids and whitefly
Small sap-suckers cluster on new growth and under leaves. Hose them off, squash them, or spray with soap or oil, and encourage ladybirds and other predators.
Two-spotted mite (red spider mite)
Fine speckling and dull leaves in hot dry weather, often with faint webbing underneath. Raise humidity, hose the undersides of leaves, and use horticultural oil if it spreads.
Tomato-potato psyllid
A pest of the wider tomato family in New Zealand. Watch for yellowing, distorted growth and sticky deposits, and see our pest guide for control. Fine mesh covers exclude it.
See our New Zealand pest and disease guide for organic control of aphids, whitefly and tomato-potato psyllid.
Harvesting
Pick eggplant while the skin is glossy and firm. Press the fruit gently with a thumb: if the flesh springs back it is ready, and if the dent stays it is overripe. Overripe fruit has dull skin and brown seeds, and turns tough and bitter. Pick regularly to keep the plant cropping, and cut the tough stem with secateurs rather than pulling the fruit.
Best eggplant varieties for New Zealand
| Variety | Type | Notes |
|---|---|---|
| Black Beauty | Large purple | Reliable favourite with large glossy dark-purple fruit and smooth flesh. (Kings Seeds, Egmont Seeds) |
| Bonica F1 | Oval hybrid | Heavy-cropping hybrid that fruits early and well, a good choice for cooler regions. (Kings Seeds) |
| Long Purple | Long, slender | Slim elongated fruit, tender and quick to mature, with few seeds. (Kings Seeds, Egmont Seeds) |
| Early Prolific F1 | Early hybrid | Heavy yields of glossy black egg-shaped fruit with good flavour. (Egmont Seeds) |
| Listada de Gandia | Striped heirloom | Purple and white striped fruit, sweet and creamy, and very ornamental. |
When to sow by region
New Zealand sits in the southern hemisphere, so the warm growing window runs from spring into autumn, and the warm north and cooler south are weeks apart. In Northland and Auckland, plant out from October. Wellington and the lower North Island follow a little later, and Canterbury, Marlborough, Otago and Southland plant from November into December, ideally under cover. Use the climate sowing selector above for timing tailored to your region.
Plant eggplant in your garden
Add eggplant in the Planting Season app for sowing, feeding and harvest reminders tuned to your region.
Open the App →Frequently Asked Questions
When should I plant eggplant in New Zealand?
Start seed indoors with bottom heat from August, then plant out only once frost has passed and nights stay above 15 degrees. In the warm north (Northland, Auckland) plant out from October. Cooler regions like Canterbury and Otago plant from November to December, and a glasshouse or sheltered sunny wall gives the most reliable crop.
Why won't my eggplant set fruit?
The usual cause is temperature. Eggplant flowers drop without setting when nights fall below about 15 degrees, which is common in a cool New Zealand spring. Gently shake open flowers to help self-pollination, keep water steady, and ease off high-nitrogen feeds once flowering starts.
Do eggplants need a lot of heat?
Yes. Eggplant is even more heat-loving than capsicum. It needs warm soil of 18 degrees or more to establish, warm nights to set fruit, and a long warm season to crop well. In cooler parts of New Zealand grow it in a glasshouse, against a hot wall, or in a pot you can move.
Can I grow eggplant in a pot?
Yes, and in cooler regions a pot is often best. Use a container of at least 30 to 40 litres of quality potting mix, and stand it in the warmest, sunniest spot. Pots warm faster than garden soil and can be moved to follow the sun or shelter from a cold snap.
How long does eggplant take to grow?
Allow about 100 days, or roughly 12 to 14 weeks, from transplant to the first pick. Plants are slow to establish but then crop steadily through the warmest months.
Where can I buy eggplant seeds in New Zealand?
Kings Seeds and Egmont Seeds both carry a good range of eggplant varieties suited to New Zealand conditions, including Black Beauty, Bonica F1 and Long Purple.
Is aubergine the same as eggplant?
Yes. Aubergine is simply the British name for the plant, and many New Zealand gardeners use both aubergine and eggplant for the same vegetable. The growing advice here applies to both.
For a calendar tuned to your exact region, see the New Zealand planting guides or the Eggplant plant page.