When to plant Mitzuna in Temperate Australia

Temperate zone — applies to Sydney, Melbourne, Adelaide, Perth, Newcastle and similar areas. Growing elsewhere? Cool · Subtropical · Tropical · Arid.

Sow mitzuna direct across autumn and spring, in February, March, April, May, September, October and November, setting the seed about 5 mm deep in cool, moist soil. This fast Japanese mustard green is ideal for the milder shoulders of the temperate year, germinating in just 4–7 days and ready to cut in around 40–60 days. Thin plants to 15–20 cm apart, with rows about 30 cm apart, or grow them closer for repeated baby-leaf cuts. Melbourne, Adelaide and Newcastle salad growers value mitzuna for its feathery, mildly peppery leaves and its willingness to keep producing through cool weather when many other greens have stalled.

Sowing calendar — temperate zone

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

Growing notes

Mitzuna is one of the quickest, most forgiving leafy crops for a temperate garden. As a hardy brassica it shrugs off cool weather, which is why the sowing window clusters in autumn and spring rather than midsummer. Rapid 4–7 day germination and a 40–60 day turnaround mean you can slot it into gaps between slower crops.

The main failure mode here is bolting. Sown into the heat of high summer, or left too long once mature, mitzuna runs quickly to a flowering stalk and the leaves turn bitter. The fix is timing and rhythm: stick to the cooler months, sow small batches every two to three weeks, and harvest young rather than waiting for large plants. Cut-and-come-again picking, taking the outer leaves regularly, keeps plants in leaf far longer than a single harvest.

As a mustard-family green it can attract the same pests as other brassicas, including caterpillars and flea beetle, which pepper the leaves with tiny holes. In a coastal Sydney or Newcastle spring, lightweight exclusion netting over the bed is the simplest defence and keeps the delicate leaves clean. Grow mitzuna in full sun to part shade on moisture-retentive soil, water consistently to keep growth soft and fast, and you will have crisp, mildly hot salad leaves through most of the cooler year.

Mitzuna at a glance

Common questions

When should I sow mitzuna in Melbourne?

Sow in the cool shoulder seasons, across February to May in autumn or September to November in spring. These windows avoid the summer heat that makes mitzuna bolt, keeping the leaves tender and mild.

Why is my mitzuna bolting so fast?

Bolting is usually triggered by heat or by leaving plants too long before harvest. Sow in cooler months, pick leaves young, and sow small successions every couple of weeks so you always have tender plants to cut.

Can I grow mitzuna as a cut-and-come-again crop?

Yes, that is one of its best uses. Sow a little more thickly and harvest the outer leaves regularly rather than pulling whole plants, and each one will keep producing new growth for weeks.

How do I stop pests eating my mitzuna leaves?

As a brassica it attracts caterpillars and flea beetle that hole the leaves. The simplest fix is lightweight exclusion netting over the bed, which keeps the fast-growing leaves clean and salad-ready.

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