Bok Choy · Sydney, NSW
A local how-to for Sydney’s temperate 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 Sydney february-may, august-november.
Climate: Temperate · Spacing: 20 cm · Days to harvest: 40-60 days (mini); 60-80 days (full-size) · Sun: full
Planting window
February-May, August-November
Spacing
20 cm
30 cm rows
Sun
Full sun to partial shade, tolerates more shade than most vegetables
Water
Regular
Growing bok choy in Sydney sits inside a specific window, february-may, august-november, and the success of the crop hinges on respecting it. Sydney's temperate climate runs winter lows of about 8°C and summer highs around 29°C, with frost risk: Frost-free (coastal), light frosts inland June-August. Those numbers are the ones every Sydney 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 Sydney, 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 Sydney 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.
Sydney's wet summers (November-February) bring fungal diseases, ensure beds have excellent drainage and space plants for airflow around tomatoes and zucchini.
Space plants 20 cm apart, with 30 cm between rows. A standard 1.2 m × 2.4 m raised bed in Sydney 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 Sydney's temperate conditions, bok choy faces the usual seasonal pests but has a long enough productive window to ride them out. 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. Sydney's wet summers (November-February) bring fungal diseases, ensure beds have excellent drainage and space plants for airflow around tomatoes and zucchini.
Good companions for bok choy in Sydney’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 Sydney 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
Sydney 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 february-may, august-november, set a reminder for the weekend before it opens, get the seedlings in, and the rest is just looking after them.
Sydney 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 Sydney february-may, august-november. 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 Sydney (temperate climate, frost risk: Frost-free (coastal), light frosts inland June-August), the productive window for bok choy is february-may, august-november. 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 Sydney include Dill, Marigold, Celery, Beetroot, Spinach. These pairings reduce pest pressure and improve pollination in Sydney's temperate 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 Sydney's temperate climate, morning sun and some protection from the harshest afternoon sun in midsummer works best.
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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