When to plant Lavender in Cool Australia

Cool zone — applies to Hobart, Canberra, Ballarat, Orange, Armidale and similar areas. Growing elsewhere? Temperate · Subtropical · Tropical · Arid.

Lavender is raised in punnets from September to November in the cool zone and transplanted out once seedlings are sturdy and the frosts are fading. Sow seed shallow — just 3 mm — and be patient: germination takes 18–28 days and is famously uneven. This is a slow, long-game plant, taking around a year to reach maturity, but English lavender is thoroughly at home in cold-winter gardens from Hobart to Orange. Space plants 50–70 cm apart in full sun with sharp drainage, and you have a shrub that will outlast most of the vegetable patch around it.

Sowing calendar — cool zone

Green months are your sowing window: September to November.

Growing notes

English lavender and the cool zone are a natural fit — this is a plant that wants cold winters, and it thrives from Hobart gardens to the frost hollows around Orange. Frost is not the enemy here. Winter wet is. Cool-climate soils sit cold and damp for months, and heavy ground rots lavender roots long before any frost hurts the top growth; the plants that die in August almost always drowned rather than froze. Plant on a slope, a raised bed or a mound of free-draining soil, mulch with gravel rather than organic matter, and keep any mulch clear of the stem.

Raising seedlings takes commitment. Sow 3 mm deep in punnets from September to November and expect slow, patchy germination over 18–28 days; a fortnight of cold treatment in the fridge before sowing improves the strike, and seedlings damp off quickly in soggy mix, so water from below and keep the air moving. Transplant in late spring at 50–70 cm spacings so plants root deeply through their first summer and meet their first winter already established.

At roughly a year to maturity, the first proper flush of flowers arrives the following season. From then on, shear plants lightly after flowering — never cutting into bare old wood, which does not reshoot — and a well-drained lavender will hold its shape for a decade.

Lavender at a glance

Common questions

When should I sow lavender seed in a cool climate?

Sow in punnets from September to November and transplant once seedlings are sturdy and spring frosts are easing. Germination is slow and uneven at 18–28 days, so sow more than you need.

Why does my lavender die over winter?

In cool climates it is almost always root rot from cold, wet soil rather than frost — English lavender is hardy. Replant into a raised bed or free-draining mound and use gravel mulch instead of organic mulch.

How long does lavender take to grow from seed?

Around a year to reach maturity, with the first good flowering flush usually the following season. It is a slow start for a shrub that then lasts many years.

Does lavender grow well in Hobart?

Yes — English lavender suits Hobart's cold winters well, provided drainage is sharp. Full sun and a raised or sloping position matter more than protection from frost.

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