When to plant Oregano in Subtropical Australia

Subtropical zone — applies to Brisbane, Gold Coast, Sunshine Coast, Coffs Harbour, Lismore and similar areas. Growing elsewhere? Temperate · Cool · Tropical · Arid.

Oregano has one of the most generous sowing windows in the subtropical calendar: sow direct from August right through to May, skipping only the two coldest months. Seed goes in 5 mm deep, germinates in anywhere from 10 to 28 days, and reaches harvest in 80–90 days. It is the toughest of the Mediterranean herbs in humidity — where thyme and rosemary sulk through a Brisbane wet season, established oregano usually pushes on — but it still wants full sun and sharp drainage. Allow a full 50 cm per plant, because it spreads sideways into an aromatic groundcover.

Sowing calendar — subtropical zone

Green months are your sowing window: August to May.

Growing notes

Within the long window there is a clear hierarchy. Spring sowings from August to October put down deep roots before the storm season and make the strongest plants. Autumn sowings from March to May establish through the kindest weather on the Sunshine Coast and are well set by winter. Midsummer sowings are allowed but risky — seedlings still in their 10–28 day germination stage damp off easily during a week of January storms, so many gardeners simply wait for the weather to break.

Flavour is managed, not fed. Oregano grown lean — full sun, no fertiliser, water only once the soil dries — is sharply pungent; plants pampered with rich soil and constant moisture through a humid Lismore summer grow lush and taste of very little. The one essential job is a hard cut-back in late November: opening the dense crown before the December wet lets air through and prevents the crown rot that claims congested clumps. Dry the trimmings and the kitchen is covered for the wet season.

In winter, growth slows but the plant holds — it is fully hardy, so light frosts on the inland fringe do no harm. Divide established clumps in early spring rather than resowing; a plant that likes its spot will fill its 50 cm allowance and keep going.

Oregano at a glance

Common questions

When can I plant oregano in the subtropics?

Sow direct almost year-round, from August through to May — only June and July are off the table. Spring and autumn sowings establish best; midsummer seedlings can damp off in storm weather.

Why does my oregano have no flavour?

Rich soil and constant moisture grow lush, bland leaves. Keep oregano lean — full sun, no fertiliser, and water only when the soil has dried — and the pungency returns.

How do I stop oregano rotting in the wet season?

Cut the clump back hard in late November so air can move through the crown before the December–February wet, and make sure drainage is sharp. Congested, unpruned clumps are the ones that get crown rot.

Does oregano survive winter in the subtropical zone?

Yes. It is fully hardy, so it holds through the mild winter and tolerates the light frosts that inland areas occasionally get; growth just slows until spring.

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