When to plant Tatsoi in Tropical Australia
Tropical zone — applies to Darwin, Cairns, Townsville, Broome, Mackay and similar areas. Growing elsewhere? Temperate · Cool · Subtropical · Arid.
Sow tatsoi direct from April to August, through the cooler, drier heart of the dry season when this glossy Asian green performs best in the tropics. Scatter or station-sow seed 5 mm deep straight into the bed, since fast-growing greens dislike disturbance. Germination is rapid at 4–7 days, and leaves are ready to cut in just 45–60 days. Thin plants to 20–25 cm apart with 30 cm between rows for full rosettes. In Darwin and Cairns, this dry-season window gives you crisp, mild leaves without the humidity that spoils tender greens.
Sowing calendar — tropical zone
Green months are your sowing window: April to August.
Growing notes
Tatsoi is quick, forgiving and well suited to the tropical dry season, when cooler nights and lower humidity let it form dense, spoon-leaved rosettes. Sow direct into rich, moisture-retentive soil in a spot with morning sun and light afternoon shade through the warmer edges of the window. Keep water even, because a check from drying out triggers bolting.
The main failure mode is bolting: if you sow too close to the wet season or into a hot, dry spell, plants run straight to flower and the leaves turn bitter. Stick to the April to August window, water consistently, and pick young. Harvest whole rosettes or take outer leaves for a longer cut-and-come-again run.
As a brassica, tatsoi attracts cabbage white butterflies, whose caterpillars pepper the leaves with holes, plus flea beetles that shot-hole seedlings. Fine exclusion netting over hoops from sowing keeps both off and protects the crop's fast, clean growth. In the humid shoulders of the season, slugs and snails also shelter under the low rosettes, so check at dusk after any rain and clear mulch back from the plants if numbers climb.
Tatsoi at a glance
| Sowing depth | 5 mm |
|---|---|
| Plant spacing | 20-25 cm |
| Row spacing | 30 cm |
| Germination | 4-7 days |
| Days to maturity | 45-60 days |
| Frost tolerance | Hardy |
| Method | Sow Direct,Raise Seedlings |
Common questions
- When is the best time to sow tatsoi in the tropics?
- Sow direct from April to August during the cooler, drier dry season. That window gives crisp, mild rosettes and avoids the humidity and heat that cause bolting and rot.
- Why is my tatsoi bolting?
- Heat and moisture stress make tatsoi run to flower. Sow within the April to August window, keep watering even, and harvest young before rising temperatures trigger bolting.
- How fast does tatsoi grow?
- Very fast. Seed germinates in 4–7 days and leaves are ready to cut in 45–60 days, making it one of the quickest greens for a tropical dry-season bed.
- Do I need to net tatsoi in Cairns?
- Yes. As a brassica it is a magnet for cabbage white butterflies and flea beetles. Fine exclusion netting over hoops from sowing keeps the leaves clean and hole-free.
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