When should I plant eggplant in temperate Australia?

Sow direct from September to February, 4 mm deep. September to November is the most reliable window, giving the full 90–120 days to maturity before autumn frosts arrive around May.

How long does eggplant take to grow?

Expect germination in 10–20 days and 90–120 days from sowing to your first harvest. It is one of the slower summer crops, which is why early sowing matters in temperate areas.

Why is my eggplant not setting fruit?

Cool weather is the usual reason — eggplant needs sustained warmth to flower and set. Plants sown too early into cold conditions also stall. Fruit set generally improves as summer heat arrives.

Why is my eggplant bitter?

Bitterness usually comes from water stress or over-mature fruit. Water deeply and regularly, mulch the bed, and pick while the skin is still glossy.

When to plant Eggplant in Temperate Australia

Sow eggplant in temperate Australia from September to February. Method: raise seedlings,sow direct. Seeds germinate in 10-20 days, with harvest roughly 90-120 days after sowing.

Temperate zone — applies to Sydney, Melbourne, Adelaide, Perth, Newcastle and similar areas. Growing elsewhere? Cool · Subtropical · Tropical · Arid.

In temperate Australia, eggplant is sown direct from September through to February, with seed planted 4 mm deep into warm soil. It is among the most cold-sensitive vegetables in the summer garden, so September and October sowings need frost protection until mid-spring, while the September-to-November window remains the mainstay for a full harvest. Germination takes 10–20 days and plants need a generous 90–120 days to reach maturity, so late-summer sowings suit quick varieties and warm spots. Allow real room — 50–75 cm between plants and 80–90 cm between rows — because a happy eggplant becomes a substantial, branching bush.

Sowing calendar — temperate zone

Green months are your sowing window: September to February.

Growing notes

Eggplant is frost tender at both ends of the season, and in temperate Australia that squeezes a long-maturing crop. The last frost typically falls around mid-October and the first returns around May, which leaves roughly seven safe months — and at 90–120 days from sowing to maturity, eggplant uses most of them. Sowings from September to November give plants time to fruit through the heat of summer. The January and February end of the window is more marginal in temperate gardens: it can work in warm, sheltered positions with fast varieties, but fruit will be racing the autumn frosts.

Give eggplant your warmest, sunniest bed with rich, free-draining soil. Sow 4 mm deep, keep the seedbed moist through the 10–20 day germination, and thin to 50–75 cm apart. Deep, regular watering plus mulch keeps fruit developing evenly; plants under water stress produce small, bitter fruit that never recovers its quality.

The failure to watch for is a cold check early in life. Seedlings that sit shivering through a cool spring often stall and never catch up, so it pays to wait for genuine warmth rather than chasing the earliest possible date. Harvest fruit while the skin is still glossy — dull skin means over-maturity and bitter, seedy flesh.

Eggplant at a glance

Sowing depth	4 mm
Plant spacing	50-75 cm
Row spacing	80-90 cm
Germination	10-20 days
Days to maturity	90-120 days
Frost tolerance	Frost Tender
Method	Raise Seedlings,Sow Direct

Companion planting

Grows well with

Marigold Nasturtiums

Marigold: Deters nematodes; attracts beneficial insects

Nasturtiums: Trap crop for aphids

Common questions

When should I plant eggplant in temperate Australia?: Sow direct from September to February, 4 mm deep. September to November is the most reliable window, giving the full 90–120 days to maturity before autumn frosts arrive around May.
How long does eggplant take to grow?: Expect germination in 10–20 days and 90–120 days from sowing to your first harvest. It is one of the slower summer crops, which is why early sowing matters in temperate areas.
Why is my eggplant not setting fruit?: Cool weather is the usual reason — eggplant needs sustained warmth to flower and set. Plants sown too early into cold conditions also stall. Fruit set generally improves as summer heat arrives.
Why is my eggplant bitter?: Bitterness usually comes from water stress or over-mature fruit. Water deeply and regularly, mulch the bed, and pick while the skin is still glossy.

Track eggplant in your garden — sow dates, harvest countdowns, reminders. Free.

Add to my garden