When to plant Tarragon in Tropical Australia

Tropical zone — applies to Darwin, Cairns, Townsville, Broome, Mackay and similar areas. Growing elsewhere? Temperate · Cool · Subtropical · Arid.

Tarragon is not recommended for tropical gardens, so there is no sowing window for it in this zone. True French tarragon barely sets viable seed at all, and the plant is a temperate perennial that needs a cool dormant winter to perform. The tropics offer no such chill, and the humid wet season quickly rots its fine roots and soft stems. In Darwin, Cairns and Townsville you will get far more flavour from a heat-loving substitute than from struggling with a herb that wants a cold season this climate never provides.

Sowing calendar — tropical zone

No sowing window in this zone.

Growing notes

The listed figures, germination in 10–28 days and maturity around 90 days from a shallow 1 mm sowing, apply to the seed-grown Russian type, which is hardier but almost flavourless. True French tarragon is grown from division, not seed, and both forms share the same tropical problem: they need a cool, dry winter dormancy to stay healthy, and they collapse in warm, wet conditions.

In the tropics, the wet season is fatal. Constant humidity and warm, moist soil cause root rot and stem collapse, and without winter chill the plant weakens year on year rather than resting and reshooting. Even in a pot it tends to sulk through the build-up and rarely develops the clean anise flavour it is prized for.

If you want that aniseed note in the kitchen, grow it in a pot of very free-draining mix in the brightest, breeziest, driest spot you have, and accept it as a short-lived experiment. A far more reliable path is a heat-tolerant herb such as Vietnamese mint or perennial basil, which thrive in tropical warmth and give you fresh flavour year round without fighting the climate.

Tarragon at a glance

Common questions

Can tarragon grow in the tropics?

Not well. It is a temperate perennial that needs a cool winter dormancy, and tropical heat plus wet-season humidity cause root rot and decline. No sowing window is recommended for this zone.

Why does my tarragon keep dying in Darwin?

The wet season is the usual killer. Warm, humid, waterlogged soil rots tarragon's fine roots, and without a cool winter the plant cannot rest and recover, so it fades away.

Is seed-grown tarragon worth it?

Seed-grown tarragon is the Russian type, which grows more easily but has little of the flavour French tarragon is loved for. In the tropics even that struggles, so most cooks choose another herb.

What herb can I use instead of tarragon in Cairns?

Vietnamese mint and perennial basil both thrive in tropical heat and humidity and crop year round. They are far more reliable than tarragon and give plenty of fresh flavour.

Keep exploring