Leafy greens
Choy sum
Fast flowering brassica grown for crisp stems and leaves.
Sowing & planting windows in Australia
Planting timing varies by broad Australian gardening zone. Local weather, unusual seasons and your garden’s microclimate can shift timing.
Cool
Sow direct / transplant seedlings · Aug–Apr
Core months: January, February, March, April, August, September, October, November, December
Temperate
Sow direct / transplant seedlings · Mar–Oct
Core months: March, April, May, June, July, August, September, October
Subtropical
Sow direct / transplant seedlings · Apr–Aug
Core months: April, May, June, July, August
Tropical
Sow direct / transplant seedlings · May–Jul
Core months: May, June, July
Arid
Sow direct / transplant seedlings · Mar–Aug
Core months: March, April, May, June, July, August
Getting started
Direct sow or transplant seedlings, spacing for airflow and rapid growth.
The right conditions
Fertile soil, regular moisture and mild conditions; heat can accelerate bolting.
As it grows
Keep growth uninterrupted and monitor caterpillars, aphids and flea beetles.
Ready to harvest
Harvest whole young plants or cut flowering stems before flowers fully open.
Important cautions
Rotate brassicas where clubroot is a local risk.
Plant guidance: Desk-reviewed under the approved horticultural-synthesis method; not field-tested. Planting windows are a guide rather than a rule.