When to plant Bok Choy in Cool Australia

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

Sow bok choy direct from March to May in autumn and again from September to November in spring, avoiding the coldest midwinter and hottest midsummer weeks. This hardy brassica germinates quickly in 5–10 days and matures fast in 45–70 days, so it suits the shoulder seasons perfectly. Sow at 5 mm deep and thin to 20–30 cm spacing with 30–40 cm between rows. In cool districts like Hobart, Ballarat and Orange, the frost tolerance of bok choy is an asset, letting you crop it either side of the frostiest part of the year for a quick, tender harvest.

Sowing calendar — cool zone

Green months are your sowing window: March to May and September to November.

Growing notes

Bok choy is one of the most rewarding quick crops for a cool climate. It is hardy, tolerates light frost, and matures in as little as 45 days, so it slots neatly into the cooler shoulder seasons of autumn and spring in districts like Canberra and Orange. Cool, moist growing conditions actually improve the flavour and keep the plants tender.

Sow direct into a fertile, moisture-retentive bed at 5 mm, keep it consistently watered, and thin early to 20–30 cm so plants can size up without competition.

Common failure mode: bolting. Bok choy runs to seed rapidly when stressed by a cold snap after sowing, a sudden heat spike, or dryness, throwing up a flower stalk before the plant is worth eating. The fix is to sow in the settled shoulder seasons rather than the extremes, keep water up so growth never checks, and choose slower-bolting varieties for spring when warming days push plants to flower.

Brassicas also attract cabbage white butterfly and its caterpillars. Even though this crop is not flagged as a primary cabbage moth target, in a warm spring you will still see them, so cover young plants with fine exclusion netting to keep the leaves clean, and check for slugs and snails, which love the tender hearts in a damp cool-climate autumn.

Bok Choy at a glance

Common questions

when to plant bok choy in a cool climate

Sow in autumn from March to May and in spring from September to November, avoiding deep midwinter and midsummer. These shoulder seasons give the steady, cool conditions bok choy prefers and reduce the risk of bolting.

why does my bok choy bolt to seed

Bolting is triggered by stress, such as a cold snap after sowing, a sudden hot spell, or drying out. Sow in the settled shoulder seasons, keep the soil evenly moist so growth never checks, and pick slower-bolting varieties for spring.

how long does bok choy take to grow

It is fast, at 45–70 days from sowing to harvest, and germinates in just 5–10 days. This quick turnaround makes it ideal for the short cool-climate shoulder seasons.

does bok choy tolerate frost in Hobart

Yes, bok choy is hardy and handles light frost, which is why it grows well either side of winter in Hobart and Orange. Very hard freezes can still damage it, so the milder autumn and spring windows are safest.

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