Bok Choy · Darwin, NT
A local how-to for Darwin’s tropical climate, the planting window, the spacing, the pest pressure, and the family-of-four quantities. Built for raised beds.
The local entry
Plant bok choy in Darwin april-august (cool season only).
Climate: Tropical · Spacing: 20 cm · Days to harvest: 40-60 days (mini); 60-80 days (full-size) · Sun: full
Planting window
April-August (cool season only)
Spacing
20 cm
30 cm rows
Sun
Full sun to partial shade, tolerates more shade than most vegetables
Water
Regular
Growing bok choy in Darwin sits inside a specific window, april-august (cool season only), and the success of the crop hinges on respecting it. Darwin's tropical climate runs winter lows of about 19°C and summer highs around 35°C, with frost risk: Frost-free. Those numbers are the ones every Darwin gardener already knows by feel; they're the reason why the same crop behaves differently in a Sydney raised bed compared to a Hobart one.
Start with the bed itself. A raised bed of at least 30 cm depth gives bok choy room for roots to extend, and in Darwin, that depth also buffers the soil temperature against the swings that catch out shallow planters. Work compost through the top 20-30 cm until the bed mix is loose and friable. Target a soil pH of 6.0-7.5, which is the band bok choy prefers. If your Darwin water is alkaline (which it often is on the mainland), add a handful of sulphur or composted leaves to nudge the pH down. See our raised bed calculator if you’re sizing the bed from scratch.
Darwin's gardening year is backwards to the south, your 'summer garden' is planted in April (start of dry season) not September.
Space plants 20 cm apart, with 30 cm between rows. A standard 1.2 m × 2.4 m raised bed in Darwin holds up to 48 bok choy plants at maximum density, though in practice you'll plant 60-70 percent of that to leave room for Dill and Marigold. Full sun to partial shade, tolerates more shade than most vegetables. Regular, keep consistently moist; drought triggers bolting. If you want the full plant-by-plant spacing reference, the plant spacing chart is the printable version.
Bok choy is a cool-season brassica that grows rapidly and is one of the most satisfying quick-turnaround crops in the raised bed garden. In Australian conditions, it thrives in autumn, winter, and spring, and can be grown in the cooler months in subtropical and tropical climates. Sow seeds direct 5mm deep in rows 30cm apart, or start in seedling trays and transplant when seedlings have 2-3 true leaves (3-4 weeks). Transplanting is generally successful with bok choy, unlike some brassicas, provided roots are not disturbed and seedlings are well-watered in.
In Darwin's tropical conditions, the dominant pressures on bok choy are humidity-driven, fungal diseases get a head start during the wet season, and pest pressure runs year-round. Cabbage white butterfly caterpillars are the primary pest, use fine insect exclusion netting or Bt spray. The crop's narrow productive window in Darwin (the dry months) means a single setback in pest or disease management can cost the whole season's yield, so plant on the early side of the window and accept that you may pull plants when the wet returns.
Good companions for bok choy in Darwin’s climate include Dill, Marigold, Celery, Beetroot. These pairings reduce pest pressure and improve pollination. Keep bok choy away from Tomato, Pepper, Fennel because they fight for the same nutrients or attract shared pests. The full matrix lives in our companion planting guide.
When it comes to the harvest itself, Harvest bok choy by cutting the whole plant at the base when it has formed a compact head. Baby bok choy is harvested at 10-15cm; full-size at 25-35cm. Alternatively, harvest outer leaves individually for a cut-and-come-again approach, plants can produce for 4-6 weeks this way. For the sweetest flavour, harvest in the morning after a cold night. Expect around 200-600g per plant depending on size at harvest. For a Darwin household of four, Plant 12-16 plants in succession for a family of 4; sow a new batch every 3 weeks through the cool season
Darwin gardeners tend to do their best work when they stop treating the year as one long growing season and start treating it as a series of windows. The window for bok choy in your climate is april-august (cool season only), set a reminder for the weekend before it opens, get the seedlings in, and the rest is just looking after them.
Darwin record
The numbers above sit behind every recommendation on this page. They’re the same climate signal Plant Planner reads from your postcode, see frost dates by city for the longer view.
Plant bok choy in Darwin april-august (cool season only). Use a raised bed at least 30 cm deep with compost-rich mix, space plants 20 cm apart in rows 30 cm apart, give it full sun to partial shade, tolerates more shade than most vegetables, and water consistently. Expect 40-60 days (mini); 60-80 days (full-size) from planting to first harvest.
In Darwin (tropical climate, frost risk: Frost-free), the productive window for bok choy is april-august (cool season only). Within that window, planting in the first two weeks gives the longest harvest tail.
Plant 12-16 plants in succession for a family of 4; sow a new batch every 3 weeks through the cool season Expected yield per plant: 200-600g per plant depending on size at harvest. Plant Planner runs this calculation against your exact household size when you sign up.
Good companions in Darwin include Dill, Marigold, Celery, Beetroot, Spinach. These pairings reduce pest pressure and improve pollination in Darwin's tropical climate. Keep bok choy away from Tomato, Pepper, Fennel, they compete for nutrients or attract shared pests.
Full sun to partial shade, tolerates more shade than most vegetables. In Darwin's tropical climate, afternoon shade in the hottest months helps avoid heat stress on the plant.
Cabbage white butterfly caterpillars are the primary pest, use fine insect exclusion netting or Bt spray. Use netting from the moment of transplanting for best results. Flea beetles create small round holes in leaves, minor damage does not affect yield significantly. Aphids cluster on young plants; treat with insecticidal soap. Club root is a soilborne disease affecting all brassicas, maintain pH above 7.0 and practice 4-year crop rotation in affected beds.
Tell us your postcode, family size, and the size of your bed. The planner runs the maths, lays out the bed, and emails you the planting reminders when the weekend before each task arrives.
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