How to Grow Eggplant in Australia

Eggplant is the most heat-demanding of the Solanaceae crops — it requires consistently warm temperatures and a long growing season. In Melbourne and Canberra, the season is short and marginal; in Brisbane, Sydney, and Perth it thrives for most of the year. In Darwin and tropical Queensland, it can be grown almost year-round.

Start seeds 8–10 weeks before the last frost (in cooler climates) or 8 weeks before planting time. Sow at 6–8mm depth in warm propagating mix at 24–30°C — a heating mat is beneficial. Seedlings grow slowly and should be well established before transplanting.

Transplant into the raised bed when nighttime temperatures are reliably above 15°C and daytime temperatures above 22°C. Plant deeply, staking immediately — eggplants become top-heavy with fruit and will blow over or snap without support.

Eggplants are heavy feeders. Incorporate generous compost and complete fertiliser into the planting hole. Feed fortnightly with a balanced liquid fertiliser during vegetative growth, switching to a potassium-rich fertiliser once flowering begins. Mulch heavily to retain soil moisture and warmth.

Variety choice matters greatly in Australia: 'Black Beauty' is the classic large purple variety; 'Lebanese Eggplant' is smaller, mild-flavoured, and very productive; 'Thai Eggplant' produces small round fruit and is particularly heat-tolerant; 'Ping Tung Long' from Taiwan is excellent for subtropical gardens.